Monitor One datasheet

Front view

The Monitor One is an off-the-shelf complete gateway design, like the Tracker One. The Monitor One is in a larger IP67 waterproof enclosure with room inside for an expansion card and additional connectors, allowing it to be used in more custom scenarios than the Tracker One.

  • Ready to go with rugged IP67-rated enclosure with room inside for an expansion card.
  • Flexible power supply to easily add asset tracking to most devices with a 6 - 30 VDC power input and a large 18650 LiPo battery pack.
  • Internal or external antennas for cellular and GNSS.
  • Temperature sensors on the carrier board, and also a battery pack temperature sensor.
  • Expansion card connector to allow for custom application specific hardware.
  • RGB LED for system status, and two user RGB LEDs for your own use, visible from outside the enclosure.
  • User button, waterproof and accessible from outside the enclosure.

Particle gateway device like the Monitor One and Tracker One are designed to be used off-the-shelf to interface to other devices and sensors using standard protocols such as CAN bus, I2C, and serial.

For information on setting up a Monitor One Developer Edition, see the Monitor One Quickstart.

The pictures in this datasheet are of a pre-release unit.

Block diagram

Block diagram

Details about the Tracker SoM that is contained within the Monitor One can be found in the Tracker SoM Datasheet.

External features

External features
Label Feature
1 System RGB LED
2 GNSS antenna (internal)
3 Cellular antenna (internal)
4 External connectors (on bottom)
5 Magnetic, bolt-down, or strap-down mounting bracket
6 User RGB LEDs (2)
7 User button (externally accessible)
8 Wi-Fi geolocation antenna (internal, optional)
9 Cover screws (6) (M2 hex, 2mm)

User button

A waterproof button is available from the outside of the enclosure.

  • Long press (10 seconds) resets the device (as if the RESET button was pressed)
  • Shorter press and multiple press can be handled by your user firmware for your own features

User LEDs (2)

  • There are two small RGB LEDs visible from the outside on the side of the unit, next to the user button.
  • The upper LED defaults to being a GNSS lock indicator:
    • Off: GNSS off
    • Blinking (green): attempting to get a GNSS fix
    • On (green): GNSS fix acquired
  • You can program custom colors, blinking, and fade effects from your user firmware for the lower LED.
  • LEDs are controlled by a ADP8866 I2C LED controller.

Connectors

Bottom Connectors

The bottom plate of the Monitor One can be customized with different connectors for your application.

Label Feature
1 Cellular antenna (SMA)
2 M12 connector (8-pin)
3 M12 connector (4-pin)
4 GNSS antenna (SMA)
5 Mounting plate attachment screw

By default the Monitor One uses the internal cellular and GNSS antennas, but can be switched to using the external connectors inside the enclosure.

The cellular (1) and GNSS (4) antennas are not connected internally at the factory. In order to use the external connectors you must open the case, disconnect the internal antenna, and instead connect the U.FL connector for the external jack.

The Monitor One is equipped with 2 external-facing SMA bulkhead connectors for both cellular and GNSS but are disconnected internally. The hardware is ready for use with external antennas giving the ability to connect a wide variety of application-specific antennas. It is recommended that the user perform required RF certifications with the selected antenna installed as the Monitor One has only been certified for use in select regions with the internal antennas.

Mounting

The Monitor One is intended to be mounted in the orientation shown at the top of the page, with the connectors facing down. You can also mount it with the mounting plate mounted on a flat surface as the GNSS antenna is angled to allow it to work in either orientation.

When using external cellular and GNSS antennas you can orient the Monitor One in other directions.

Back View
Label Details
1 Mounting screw or bolt holes
2 Slots for strap mounting
3 Magnets
4 Mounting plate removal screw (M3 hex, 3mm)

The mounting plate contains two magnets (3) that allow it to be easily mounted on a metal surface.

The mounting plate is removable from the back of the unit after removing the screw on the bottom (4), near the expansion connectors.

Once removed, you can screw or bolt the mounting plate through the four holes (1) and reattach the Monitor One. This is good for rough conditions and for mounting on non-metal surfaces.

The mounting plate can be strap mounted through the two slots (2).

The magnets do not need to removed to use screw, bolt, or strap mounting.

Dimensions Metric SAE
Top, width between mounting holes 28 mm 1 3/32"
Bottom, width between mounting holes 46 mm 1 13/16"
Height between mounting holes 140 mm 5 1/2"
Mounting bracket holes
Dimensions Metric SAE
Bolt/screw head hole diameter (maximum) 12.46 mm 31/64"
Bolt/screw head maximum height (maximum) 4.0 mm 5/32"
Bolt/screw hole diameter (maximum) 4.33 mm 11/64"
Bolt/screw shaft to surface (maximum) 3.65 mm 9/64"
Recommended bolt or screw M4 #8
Mounting bracket screw hole dimensions

When mounting using a strap, the strap will hold the mounting bracket against a surface and is sandwiched between the mounting bracket and the Monitor One enclosure.

Dimensions Metric SAE
Maximum strap width 15 mm 19/32"
Strap mounting dimensions

If you wish to fabricate your own compatible mounting bracket, the STEP file can found in the Monitor One Github repository.

Internal features

Base board features
Label Feature
1 MCU USB Connector (Micro B)
2 User RGB LEDs (2, externally visible)
3 User Button (externally accessible)
4 System RGB LED (externally visible)
5 GNSS antenna (internal, optional)
6 GNSS antenna U.FL connector
7 Cellular antenna (internal)
8 Cellular antenna U.FL connector
9 Expansion card headers (2)
10 SWD debugging connector
11 Wi-Fi geolocation antenna U.FL connector
12 MODE and SETUP buttons
13 VIN connector
14 Expansion card to external connector cable
15 LiPo battery connector
16 Cellular antenna SMA connector (external)
17 Expansion card external connector #1 (M12, 8-pin)
18 Expansion card external connector #2 (M12)
19 GNSS antenna SMA connector (external)
20 Tracker SoM module
21 Wi-Fi geolocation antenna (internal, not pictured)

I/O Card

The Monitor One is designed with easy-to-use expansion headers and an enclosure with sufficient space inside for an expansion card, and for additional expansion connector through the wall of enclosure.

The Monitor One Developer's Edition includes the I/O Card, which includes:

Feature Location Details
VIN M12 8-pin Power input, 6 - 30V DC
CAN Bus M12 8-pin
RS485 (Modbus) M12 8-pin
4-20 mA input M12 8-pin
0-10V analog input M12 8-pin
12-24V slow-signal input M12 4-pin Opto-isolated
Relay M12 4-pin 30VDC 2A maximum
QWIIC connector expansion card 3.3V I2C
I/O Card

I/O Card M12 8-pin to flying leads

The Monitor One includes a M12 8-pin male to flying leads cable, 1500±20mm (about 60 inches or 5 feet). This is used to power the Monitor One, and also use the 4-20mA, 0-10V analog in, CAN bus, and RS485 (Modbus) interfaces.

M12 Cable Connector

Looking at the pins on the end of the connector on the cable

Conn P1 (M12) Color Function GPIO
1 White CAN_P
2 Red VIN (6-30 VDC)
3 Green 4-20mA input A7
4 Yellow 0-10V input A6
5 Gray RS485_B (N)
6 Pink RS485_A (P)
7 Blue CAN_N
8 Black Ground
M12 8-pin flying leads

Also included is an adapter from screw terminals to a 5.5x2.1mm barrel jack, center positive. If you disconnect and reconnect the adapter, make sure the + screw terminal is connected to red and the - screw terminal is connected to black. An appropriate 24 VDC power adapter is included.

Any 6VDC to 30VDC power adapter at 2A with a 5.5x2.1mm barrel connector, center positive can be used instead, if desired. For automotive use, you can use this power input directly to a 12V or 24V vehicle power system as the power supply is designed to handle transient voltage present on vehicle power systems.

The RS485 and CAN interface pins on the M12 8-pin connector cannot be used as GPIO.

I/O Card M12 4-pin to flying leads

The Monitor One includes a M12 4-pin male to flying leads cable, 1500±20mm (about 60 inches or 5 feet).

M12 8-pin flying leads
Conn P1 (M12) Color Function GPIO
1 Red 12-24V slow-signal input A5
2 Green Relay COM
3 Black Ground
4 Blue Relay (NO) NFC_PIN2

I/O Card details

I/O Card
Label Details
1 Prototyping area
2 Power LED (LED1)
3 RESET and MODE buttons
4 QWIIC (I2C) connector
5 RS-485 120 ohm termination resistor enable (JP3)
6 RS-485 pull-up resistor (JP4)
8 RS-485 pill-down resistor (JP5)
9 CAN_5V LED (LED3)
10 Relay energized LED (LED2)
11 CAN termination resistor enable (JP9)
12 CAN termination capacitor enable (JP10)
13 Slow-signal input (12-24V) powered (LED4)
14 M12 8-pin solder jumpers, location for prototyping wires
16 Connector to M12 8-pin
17 Slow-signal input (12-24V) and GND
18 Relay COM and NO (normally open)
19 Access to expansion card signals
20 Access to expansion card signals

The M12 4-pin bulkhead connector has flying leads that are connected to the screw terminals (18) as follows:

M12 Pin Color Card
1 Red INPUT
2 Green COM
3 Black GND
4 Blue NO

Customizing the I/O Card

If you wish to build upon the I/O Card, there is a small prototyping area (1).

If you need signals from the expansion card interface, they are available in the rows of pins (19, 20).

If you wish to disable an interface that you are not using and re-use the pins on the M12 8-pin connector, there is a small trace jumper between the rows of pins in area (14). Cutting this trace isolates the expansion card signal from the signal to the connector (16). Then you can solder a small jumper wire to replace the signal on the M12 8-pin.

The Eagle CAD schematic and board layout files for the I/O card can be found in the Monitor One Github repository.

Block diagram - I/O Card

Block diagram

Schematics - I/O Card

Interconnects - I/O Card

Interconnects
Interconnects

RS485 - I/O Card

RS-485

CAN - I/O Card

CAN

4-20mA - I/O Card

4-20mA

0-10V - I/O Card

0-10V

Slow signal input - I/O Card

slow signal input

Relay - I/O Card

relay

EEPROM - I/O Card

eeprom

Board layout - I/O Card

Board layout

Prototype Card

Prototype Card
Label Feature
1 QWIIC (I2C) connector
2 RESET and MODE buttons
3 EEPROM
4 Prototyping area
5 Access to expansion port signals
6 Access to bulkhead connector signals
7 B8B-PH connector, connect to M12 8-pin
8 Screw terminals, connect to M12 4-pin

B8B-PH connector

The left connector (7) attaches to the M12 8-pin connector with a short adapter cable. You don't have to use this cable setup, but it's often convenient to do so.

Connector B8B-PH Color M12 Pin Function
8 2 Red VIN (6-30 VDC)
7 8 Black Ground
6 6 Pink
5 5 Gray
4 1 White
3 7 Blue
2 4 Yellow
1 3 Green
  • We recommend that you keep pin 8 (VIN) and pin 7 (GND) is the same positions.
  • Other pins can be used as desired.
  • The pins on the board layout are numbered 8 - 1 left to right, opposite of how the pins on the cable are numbered.

Screw terminals

Screw Terminal Color M12 Pin
A Red 1
B Black 3
C Green 2
D Blue 4
  • The order of these pins isn't significant, but this is how the I/O Card is wired, so it probably best to be consistent.

Schematics - Prototyping Card

Prototype Card Schematics
Prototype Card Schematics
Prototype Card Schematics

The Eagle CAD schematic and board layout files for the prototype can be found in the Monitor One Github repository.

Expansion card interface

  • Expansion card size: 50mm x 90mm (approximately 2" x 3.5")
  • Connectors: 24-pin 0.1" headers (two, one on each long side)
  • Male header pins on the bottom of expansion card
  • Attachment: 4 screws to standoffs (M3 screw recommended)

Pre-built expansion cards will be available, including the Prototype Card. You can also design and fabricate your own.

If you are building your own card, you can start with the design for the I/O card or prototype card. The Eagle CAD schematic and board layout files can be found in Monitor One Github repository.

Expansion card pinout

Expansion card pinout

Expansion card dimensions

Expansion card dimensions

Expansion card location

Expansion card location
Label Feature
14 Expansion card to external connector cable (M12 to PHR8)
17 Expansion card external connector #1 (M12, 8-pin)
22 Location of expansion card (green outline)

The enclosure typically has a panel-mount M12 8 pin female connector in location 17 in the picture above. This is connected via a short cable to a PHR-8 female connector that attaches to your expansion card. The picture above shows the cable but a board is not installed in the picture.

The functions of the pins on the M12 8-pin connector are dependent on your base board, but the following pinouts are recommended:

Conn P1 (M12) Conn P2 (PHR-8) Color Function
2 1 Red VIN (6-30 VDC)
8 2 Black Ground
6 3 Pink RS485_A (P)
5 4 Gray RS485_B (N)
1 5 White CAN_P
7 6 Blue CAN_N
4 7 Yellow 0-10V input
3 8 Green 4-20mA input
Round Rectangular
Enclosure Expansion Card
M12-8 to PHR-8 cable
  • Cable length: 60 ±5 mm
  • Wire gauge: 24 AWG
  • M12 8-pin connector, A-coded

M12 connectors

The standard M12 connectors are IP67 waterproof (connected or not), 12 mm in diameter, and have 8 pins or 4 pins. However, M12 connectors are available from 2 pin to 17 pins. The connectors with smaller numbers of pins often have higher voltage and current ratings.

The panel-mount 8-pin connector on the Monitor One is female, with the following pinout:

M12 panel connector

Looking at the bulkhead connector from outside the enclosure

The panel mount M12 8-pin connector fits in the following hole in the enclosure:

M12 hole

GPIO

Pin Name Description SoM Pin MCU
NFC2_VIN_EN GPIO (used for relay on I/O Card) 27 P0.10
NFC1_PERIPH_INT Peripheral interrupt (active low) 26 P0.09
TSOM_A7 / D7 A7 Analog in, GPIO D7, PWM, SPI SS, WKP 38 P0.05
TSOM_A6 / D6 A6 Analog in, GPIO D6, PWM, SPI (SCK) 39 P0.04
TSOM_A5 / D5 A5 Analog in, GPIO D5, PWM, SPI MISO 40 P0.29
TSOM_A4 / D4 A4 Analog in, GPIO D4, PWM, SPI MOSI 41 P0.31
TSOM_A2_BUTTON / D2 External user button, A2 Analog in, GPIO D2, PWM 57 P0.28
TSOM_A3_BATT_TEMP / D3 Battery temperature sensor, A3 Analog in, GPIO D3, PWM 58 P0.30
RX / D9 Serial1 RX, GPIO D9, PWM, Wire3 SDA 71 P0.08
TX / D8 Serial1 TX, GPIO D8, PWM, Wire3 SCL 72 P0.06
  • On the Monitor One, pins A0 and A1 are used in I2C mode by the user RGB LED temperature sensor. Pins A0 and A1 cannot be used as GPIO.
  • On the Monitor One, you should not use A2 and A3 as GPIO or analog inputs as they are used by the external user button and battery temperature thermistor.
  • All GPIO are 3.3V and are not 5V tolerant.

When using the I/O Card:

Pin Direction Function
A4 Output Direction control for RS485
A5 Digital Input Slow signal input, optoisolated, 12V to 24V = HIGH
A6 Analog Input Analog input, 0-10V, 10V=4095
A7 Analog Input 4-20mA, 4mA=0, 20mA=4095
NFC_PIN2 Output Relay coil, HIGH = energized

ADC

Pin Name Description Interface SoM Pin MCU
TSOM_A7 / D7 A7 Analog in, GPIO D7, PWM, SPI SS, WKP ADC3 38 P0.05
TSOM_A6 / D6 A6 Analog in, GPIO D6, PWM, SPI (SCK) ADC2 39 P0.04
TSOM_A5 / D5 A5 Analog in, GPIO D5, PWM, SPI MISO ADC5 40 P0.29
TSOM_A4 / D4 A4 Analog in, GPIO D4, PWM, SPI MOSI ADC7 41 P0.31
TSOM_A2_BUTTON / D2 External user button, A2 Analog in, GPIO D2, PWM ADC4 57 P0.28
TSOM_A3_BATT_TEMP / D3 Battery temperature sensor, A3 Analog in, GPIO D3, PWM ADC6 58 P0.30
  • On the Monitor One, you should not use A2 and A3 as analog inputs as they are used by the external user button and battery temperature thermistor.

SPI

Pin Name Description Interface SoM Pin MCU
TSOM_A6 / D6 A6 Analog in, GPIO D6, PWM, SPI (SCK) SPI (SCK) 39 P0.04
TSOM_A5 / D5 A5 Analog in, GPIO D5, PWM, SPI MISO SPI (MISO) 40 P0.29
TSOM_A4 / D4 A4 Analog in, GPIO D4, PWM, SPI MOSI SPI (MOSI) 41 P0.31
  • Any available GPIO can be used as a SPI CS/SS pin.

I2C

Pin Name Description Interface SoM Pin MCU
TSOM_A0_SDA / D0 Wire SDA Wire (SDA) 55 P0.03
TSOM_A1_SCL / D1 Wire SCL Wire (SCL) 56 P0.02
RX / D9 Serial1 RX, GPIO D9, PWM, Wire3 SDA Wire3 (SDA) 71 P0.08
TX / D8 Serial1 TX, GPIO D8, PWM, Wire3 SCL Wire3 (SCL) 72 P0.06
  • On the Monitor One, pins A0 and A1 are used in I2C mode by the user RGB LED and temperature sensor. Pins A0 and A1 cannot be used as GPIO.
  • On the Monitor One (and Tracker SoM), Wire and Wire3 are two different I2C peripherals and can be used at the same time.
  • On the Monitor One (and Tracker SoM), Wire3 and Serial1 share the same pins and only one can be used at a time.
  • I2C is 3.3V only and is not 5V tolerant.
  • There are 4.7K pull-up resistors on TSOM_A0_SDA and TSOM_A1_SCL to 3.3V on the base board.

Serial (UART)

Pin Name Description Interface SoM Pin MCU
RX / D9 Serial1 RX, GPIO D9, PWM, Wire3 SDA Serial1 RX 71 P0.08
TX / D8 Serial1 TX, GPIO D8, PWM, Wire3 SCL Serial1 TX 72 P0.06
  • On the Monitor One (and Tracker SoM), Wire3 and Serial1 share the same pins and only one can be used at a time.
  • Hardware flow control is not available on the Monitor One.
  • Serial pins are 3.3V only and are not 5V tolerant.
  • Additional interface chips are required for other serial standards such as RS232 and RS485.

PWM

Pin Name Description Interface SoM Pin MCU
TSOM_A7 / D7 A7 Analog in, GPIO D7, PWM, SPI SS, WKP PWM1 38 P0.05
TSOM_A6 / D6 A6 Analog in, GPIO D6, PWM, SPI (SCK) PWM1 39 P0.04
TSOM_A5 / D5 A5 Analog in, GPIO D5, PWM, SPI MISO PWM1 40 P0.29
TSOM_A4 / D4 A4 Analog in, GPIO D4, PWM, SPI MOSI PWM1 41 P0.31
TSOM_A2_BUTTON / D2 External user button, A2 Analog in, GPIO D2, PWM PWM0 57 P0.28
TSOM_A3_BATT_TEMP / D3 Battery temperature sensor, A3 Analog in, GPIO D3, PWM PWM0 58 P0.30
RX / D9 Serial1 RX, GPIO D9, PWM, Wire3 SDA PWM2 71 P0.08
TX / D8 Serial1 TX, GPIO D8, PWM, Wire3 SCL PWM2 72 P0.06
  • On the Monitor One, you should not use A2 and A3 as PWM outputs as they are used by the external user button and battery temperature thermistor.
  • All pins on the same hardware timer (PWM0, PWM1, or PWM2) must share the same frequency but can have different duty cycles.

CAN

Pin Name Description Interface SoM Pin
CAN_N CAN Data- or CANL CAN_N 64
CAN_P CAN Data+ or CANH CAN_P 65
CAN_5V 5V power out, 0.8A maximum. Can be controlled by software. CAN_5V 66

The CAN transceiver is included on the Tracker SoM. However if you implement CAN on your expansion card, you will probably want to add protection circuitry. This circuit is present on the Monitor One CAN expansion card and also on the Tracker One.

CAN schematic

Note that the two 60.4 ohm resistors are DNP (do not populate). If populated, these provide the 120 ohm CAN termination, if you need it in your design.

All expansion card pins

Pin Pin Name Description MCU
1 GNSS_PULSE GNSS time pulse output. Can be used for a GPS fix LED.  
2 NC    
3 NC    
4 NC    
5 NC    
6 NC    
7 NC    
8 NC    
9 NFC2_VIN_EN GPIO (used for relay on I/O Card) P0.10
10 NFC1_PERIPH_INT Peripheral interrupt (active low) P0.09
11 TSOM_MODE MODE button (active low) P1.13
12 TSOM_RESET RESET button (active low)  
13 TSOM_A7 / D7 A7 Analog in, GPIO D7, PWM, SPI SS, WKP P0.05
14 TSOM_A6 / D6 A6 Analog in, GPIO D6, PWM, SPI (SCK) P0.04
15 TSOM_A5 / D5 A5 Analog in, GPIO D5, PWM, SPI MISO P0.29
16 TSOM_A4 / D4 A4 Analog in, GPIO D4, PWM, SPI MOSI P0.31
17 GND Ground.  
18 3V3 3.3V out, 1000 mA maximum including nRF52 and other peripherals.  
19 RUN Pull low to disable LTC7103 regulator. Has 100K pull-up to VIN.  
20 PGOOD LTC7103 regulator open drain power good output. Pulled low when regulator is not in regulation.  
21 GND Ground.  
22 GND Ground.  
23 VIN Power input, 6 - 90 VDC  
24 VIN Power input, 6 - 90 VDC  
25 LI+ Connect to Li-Po battery. Can power the device or be recharged by VIN or VBUS.  
26 GND Ground.  
27 TSOM_USB_VBUS nRF52 USB power input. Can be used as a 5V power supply instead of VIN.  
28 GND Ground.  
29 TSOM_VIN Tracker SoM power input 5V-12V DC.  
30 GND Ground.  
31 5V 5V power output when powered by VIN or USB  
32 GND Ground.  
33 TSOM_A0_SDA / D0 Wire SDA P0.03
34 TSOM_A1_SCL / D1 Wire SCL P0.02
35 TSOM_A2_BUTTON / D2 External user button, A2 Analog in, GPIO D2, PWM P0.28
36 TSOM_A3_BATT_TEMP / D3 Battery temperature sensor, A3 Analog in, GPIO D3, PWM P0.30
37 GND Ground.  
38 CAN_N CAN Data- or CANL  
39 CAN_P CAN Data+ or CANH  
40 CAN_5V 5V power out, 0.8A maximum. Can be controlled by software.  
41 GND Ground.  
42 TSOM_USB_N nRF52 MCU USB interface D-.  
43 TSOM_USB_P nRF52 MCU USB interface D+.  
44 GND Ground.  
45 RX / D9 Serial1 RX, GPIO D9, PWM, Wire3 SDA P0.08
46 TX / D8 Serial1 TX, GPIO D8, PWM, Wire3 SCL P0.06
47 RTC_BAT RTC/Watchdog battery +. Connect to GND if not using.  
48 RTC_EXTI RTC EXTI. Can use as a wake button. Has 100K weak pull-up to 3V3.  
  • Pins 9 and 10 have NFC in the name from the Tracker SoM, however NFC cannot be used on the Monitor One as the pins must be used as VIN_EN and PERIPH_INT.

I/O characteristics

The GPIO pins on the expansion connector have the following specifications, from the nRF52840 datasheet:

Symbol Parameter Min Typ Max Unit
VIH Input high voltage 0.7 xVDD VDD V
VIL Input low voltage VSS 0.3 xVDD V
VOH,SD Output high voltage, standard drive, 0.5 mA, VDD ≥1.7 VDD - 0.4 VDD V
VOH,HDH Output high voltage, high drive, 5 mA, VDD >= 2.7 V VDD - 0.4 VDD V
VOH,HDL Output high voltage, high drive, 3 mA, VDD >= 1.7 V VDD - 0.4 VDD V
VOL,SD Output low voltage, standard drive, 0.5 mA, VDD ≥1.7 VSS VSS + 0.4 V
VOL,HDH Output low voltage, high drive, 5 mA, VDD >= 2.7 V VSS VSS + 0.4 V
VOL,HDL Output low voltage, high drive,3 mA, VDD >= 1.7 V VSS VSS + 0.4 V
IOL,SD Current at VSS+0.4 V, output set low, standard drive, VDD≥1.7 1 2 4 mA
IOL,HDH Current at VSS+0.4 V, output set low, high drive, VDD >= 2.7V 6 10 15 mA
IOL,HDL Current at VSS+0.4 V, output set low, high drive, VDD >= 1.7V 3 mA
IOH,SD Current at VDD-0.4 V, output set high, standard drive, VDD≥1.7 1 2 4 mA
IOH,HDH Current at VDD-0.4 V, output set high, high drive, VDD >= 2.7V 6 9 14 mA
IOH,HDL Current at VDD-0.4 V, output set high, high drive, VDD >= 1.7V 3 mA
RPU Pull-up resistance 11 13 16
RPD Pull-down resistance 11 13 16
  • GPIO default to standard drive (2mA) but can be reconfigured to high drive (9mA) in Device OS 2.0.0 and later using the pinSetDriveStrength() function.

GPIO and port leakage current warning

Be careful when you are connecting GPIO or ports such as serial that may have power when the Monitor One is not powered, such as when using shipping mode.

If you have current flowing into GPIO or ports of the nRF52840 when it is powered down, it can cause it to enter a state where it cannot be reawaked without removing all power from it, including the internal LiPo battery. This may be difficult if you've sealed your Monitor One enclosure.

The Tracker One has a TI TS3A5018 Quad SPDT Analog Switch on the three GPIO pins (A3, D9/RX/SDA, D8/TX/SCL) to prevent this. The switch is normally open, and is closed when the CAN_5V is powered. By default, Tracker Edge enables CAN_5V when in normal operating mode and turns it off during sleep, however this behavior can be changed by using enableIoCanPower() and enableIoCanPowerSleep() in the TrackerConfiguration object.

The Tracker One circuit looks like this, and you may want to implement something similar if you are in a scenario where you have externally powered peripherals.

CAN Protection Circuitry

This is not necessary if your external peripherals are powered by 3V3 or CAN_5V.

VIN disable

By default, if power is applied at the VIN pin it will be used to power the Monitor One and charge the built-in battery.

If you are supplying VIN from another, larger battery pack, and want to be able to disconnect the VIN power supply to minimize current loss, you can do so using the following circuit in lieu of using NFC2 as the relay pin, as the I/O Card does.

VIN disable

By disconnecting the VIN power supply, it reduces the current used by the VIN and PMIC voltage regulators. The Monitor One can still be powered by its internal LiPo battery. This is particularly advantageous if the Monitor One is in sleep mode while VIN is disconnected as the power supply loss will be large compared to the very low sleep current in this scenario.

GPIO and Ports vs. Tracker One

Pin Monitor One Tracker One
A0 I2C SDA1 Internal Thermistor
A1 I2C SCL1 User Button (not accessible)
A2 External Button GNSS lock indicator
A3 Battery Temperature M8 Analog in, GPIO
A4 Analog in, GPIO, PWM, SPI MOSI1 Not available
A5 Analog in, GPIO, PWM, SPI MISO1 Not available
A6 Analog in, GPIO, PWM, SPI SCK1 Not available
A7 Analog in, GPIO, PWM, SPI SS, WKP Not available
TX MCU serial TX, GPIO D8, Wire3 SCL1 MCU serial TX, GPIO D8, Wire3 SCL
RX MCU serial RX, GPIO D9, Wire3 SDA1 MCU serial RX, GPIO D9, Wire3 SDA

1Available on expansion card connector (internal)

  • On the Monitor One, the expansion card connector allows the use the I2C, Serial, and SPI at the same time
  • On the Tracker One, you must choose between using the M8 for either serial or I2C. SPI is not available.

Tracker feature comparison

Tracker SoM Tracker M Tracker One Monitor One
Style SMD Module Module All-in-one All-in-one
Enclosure Your design Your design Included Included
MCU nRF52840 RTL8721DM nRF52840 nRF52840
CPU Speed 60 MHz 200 MHz 64 MHz 64 MHz
Maximum user binary 256 KB 2 MB 256 KB 256 KB
Flash file system6 4 MB 2 MB 4 MB 4 MB
Base board Your design Included Included Included
Expansion connector Your design 8-pin M8 8-pin Multiple options
GNSS Antenna Your design Int/Ext2 Internal Int/Ext2
Cellular Antenna Your design Int/Ext2 Internal Int/Ext2
Wi-Fi geolocation antenna Your design Int/Ext5 Internal Internal
BLE Antenna Your design Int/Ext5 Internal Internal4
NFC Tag Your design n/a Included n/a
USB Connector Your design Micro B USB C Micro B (Int)3
System RGB LED Your design Included Included Included
External user button n/a n/a
User RGB LEDs 2
SETUP and MODE buttons Your design On board Inside Enclosure Inside Enclosure
External power 3.9 - 17 VDC 6 - 90 VDC 6 - 30 VDC 6 - 90 VDC
SPI Expansion card n/a Expansion card
I2C Expansion card M8 Expansion card
Serial Expansion card M8 Expansion card
Internal temperature sensor Your design
Battery temperature sensor n/a n/a
Controlling charging by temperature Your design In hardware In software In software

1On the Tracker One, the M8 can be configured for GPIO, I2C (SDA and SCL), or Serial (RX and TX) on two pins.

2Both internal and external GNSS and cellular are supported by physically changing the antenna connector inside the enclosure.

3There is no external MCU USB connector on the Monitor One.

4The Monitor One uses the Tracker SoM BLE chip antenna on the board and does not include a separate BLE antenna, but one could be added using the BLE U.FL connector.

5The Tracker M uses a shared antenna for BLE and Wi-Fi geolocation. You can use the built-in trace antenna or an external 2.4 GHz/5 GHz dual-band antenna, selectable in software.

6A small portion of the flash file system is used by the system, and a configurable portion can be used for store and forward, to optionally allow location publishes to be saved when the device is offline to be uploaded later. The remainder of the flash file system can be used by user applications.

Schematics

Schematic
Schematic
Schematic
Schematic
Schematic
Schematic
Schematic

Mechanical specifications

Operating temperature

Parameter Minimum Maximum Units
Operating temperature -10 60 °C
Battery charging enabled 0 40 °C

Dimensions and weight

Dimensions Metric SAE
Width 121 mm 4 3/4"
Height 220 mm 8 5/8"
Depth 69 mm 2 11/16"
Weight 775 g 27.3 oz
Dimensions
Dimensions

Dimensions for top cover artwork

Artwork dimensions

Power consumption

To be provided at a later date.

Battery specifications

  • Lithium-ion cylindrical rechargeable battery
  • Model: 18650-4P
  • Description: Single cell with PCM
  • Battery capacity: 12200 mAh
  • Batter voltage : 3.7 VDC (nominal)
  • Manufacturer: Guangdong Zhaoeng Technology Co., Ltd. (Guangdong, China)
  • Datasheet

Country compatibility

To be provided at a later date.

Country Model Technologies Carriers
Albania MON524 2G, 3G, Cat1 ALBtelecom, Telekom, Vodafone
Algeria MON524 2G, 3G, Cat1 Mobilis, Ooredoo
Aruba MON524 2G, 3G, Cat1 Setar
Australia MON524 3G, Cat1 Optus, Telstra, Vodafone
Austria MON524 2G, 3G, Cat1 3 (Drei), A1, T-Mobile
Bahrain MON524 2G, 3G, Cat1 Zain
Bangladesh MON524 2G, 3G, Cat1 Bangalink, GrameenPhone
Belarus MON524 2G, 3G, Cat1 A1
Belgium MON524 2G, 3G, Cat1 Base, Orange, Proximus
Bosnia and Herzegovina MON524 2G, 3G BH Telecom, HT Eronet
Botswana MON524 2G, 3G, Cat1 BeMobile
Brunei MON524 3G, Cat1 DST
Bulgaria MON524 2G, 3G A1, Telenor, Vivacom
Burkina Faso MON524 2G, 3G, Cat1 Orange
Cabo Verde MON524 2G, 3G, Cat1 CVMóvel, Unitel T+
Cambodia MON524 2G, 3G Metfone
Canada MON404 M1 Bell Mobility, Rogers Wireless, Telus
Chad MON524 2G, 3G, Cat1 Airtel
Chile MON524 2G, 3G, Cat1 Claro, Entel, Movistar
Congo (Brazzaville) MON524 2G, 3G, Cat1 Airtel
Congo (Kinshasa) MON524 2G, 3G, Cat1 Airtel
Côte d'Ivoire MON524 2G, 3G, Cat1 MTN
Croatia MON524 2G, 3G, Cat1 Hrvatski Telekom, Tele2
Cyprus MON524 2G, 3G, Cat1 Cytamobile-Vodafone, MTN, PrimeTel
Czechia MON524 2G, Cat1 O2, T-Mobile, Vodafone
Denmark MON524 2G, 3G, Cat1 3 (Tre), TDC, Telenor, Telia
Egypt MON524 2G, 3G, Cat1 Etisalat, Orange
Estonia MON524 2G, 3G, Cat1 Elisa, Tele2, Telia
eSwatini MON524 2G, 3G, Cat1 MTN
Ethiopia MON524 2G, 3G, Cat1 Ethio Telecom
Faroe Islands MON524 2G, 3G Faroese Telecom, Vodafone
Finland MON524 2G, 3G, Cat1 DNA, Elisa, Telia
France MON524 2G, 3G, Cat1 Bouygues, Free Mobile, Orange, SFR
French Guiana MON524 2G, 3G Digicel
Gabon MON524 2G, 3G, Cat1 Airtel
Germany MON524 2G, 3G, Cat1 O2, Telekom, Vodafone
Ghana MON524 2G, 3G, Cat1 AirtelTigo, MTN, Vodafone
Gibraltar MON524 2G, 3G, Cat1 Gibtel
Greece MON524 2G, Cat1 Cosmote, Vodafone, Wind
Guinea MON524 2G, 3G, Cat1 MTN
Guinea-Bissau MON524 2G, 3G, Cat1 MTN
Guyana MON524 2G Digicel
Hong Kong MON524 2G, 3G, Cat1 CMHK, CSL, SmarTone
Hungary MON524 2G, 3G, Cat1 Magyar Telekom, Telenor, Vodafone
Iceland MON524 2G, 3G, Cat1 Nova, Siminn, Vodafone
Indonesia MON524 2G, 3G, Cat1 Indosat, Telkomsel, XL Axiata
Ireland MON524 2G, 3G, Cat1 3 (Tre), Meteor, O2, Vodafone
Israel MON524 2G, 3G, Cat1 Hot Mobile, Orange, Pelephone
Italy MON524 2G, 3G, Cat1 TIM, Vodafone, Wind
Jordan MON524 2G, 3G, Cat1 Zain
Kazakhstan MON524 2G, 3G, Cat1 Beeline, K-Cell
Kenya MON524 2G, 3G, Cat1 Airtel
Kuwait MON524 2G, 3G, Cat1 Viva, Zain
Latvia MON524 2G, 3G, Cat1 Bite, LMT, Tele2
Liechtenstein MON524 2G, 3G, Cat1 Mobilkom, Orange
Lithuania MON524 2G, 3G, Cat1 Bite, Omnitel, Tele2
Luxembourg MON524 2G, 3G, Cat1 Orange, POST, Tango
Macao MON524 2G, 3G, Cat1 CTM
Madagascar MON524 2G, 3G, Cat1 Airtel
Malawi MON524 2G, 3G, Cat1 Airtel
Malaysia MON524 2G, 3G, Cat1 Celcom, DiGi, Maxis
Malta MON524 2G, 3G, Cat1 Go Mobile, Vodafone
Mexico MON404 M1 AT&T, Telcel
Moldova MON524 2G, 3G, Cat1 Moldcell, Orange
Mongolia MON524 2G, 3G Mobicom, Unitel
Montenegro MON524 2G, 3G, Cat1 Mtel, T-Mobile, Telenor
Morocco MON524 2G, 3G, Cat1 Inwi, Medi Telecom
Mozambique MON524 2G, 3G, Cat1 Vodacom
Myanmar MON524 2G, 3G, Cat1 MPT, Telenor
Namibia MON524 2G, 3G, Cat1 Telecom Namibia
Netherlands MON524 2G, 3G, Cat1 KPN, T-Mobile, Vodafone
New Zealand MON524 2G, 3G, Cat1 2degrees, Spark, Vodafone
Nigeria MON524 2G, 3G, Cat1 9mobile, Airtel, Glo, MTN
Norway MON524 2G, 3G, Cat1 TDC, Telenor, Telia
Pakistan MON524 2G, 3G, Cat1 Mobilink, Telenor, Ufone, Warid
Palestine MON524 2G, 3G Jawwal
Papua New Guinea MON524 2G, 3G bmobile
Poland MON524 2G, 3G, Cat1 Orange, Play, Plus, T-Mobile
Portugal MON524 2G, 3G, Cat1 NOS, TMN, Vodafone
Qatar MON524 2G, 3G, Cat1 Ooredoo, Vodafone
Romania MON524 2G, 3G, Cat1 Orange, Telekom Romania, Vodafone
Rwanda MON524 2G, 3G, Cat1 Airtel, MTN
Serbia MON524 2G, 3G, Cat1 Telenor, VIP
Seychelles MON524 2G, 3G, Cat1 Airtel
Sint Maarten MON524 2G, 3G, Cat1 TelCell
Slovakia MON524 2G, 3G, Cat1 O2, Orange, Telekom
Slovenia MON524 2G, 3G, Cat1 A1, Mobitel
South Africa MON524 2G, 3G, Cat1 Cell C, MTN, Vodacom
South Korea MON524 3G, Cat1 KT, LG U+, SK Telecom
South Sudan MON524 2G, 3G, Cat1 MTN
Spain MON524 2G, 3G, Cat1 Orange, Telefonica, Vodafone, Yoigo
Sri Lanka MON524 2G, 3G, Cat1 Dialog, Mobitel
Suriname MON524 2G, 3G Telesur
Sweden MON524 2G, 3G, Cat1 3 (Tre), Tele2, Telenor, Telia
Switzerland MON524 3G, Cat1 Salt, Sunrise, Swisscom
Taiwan MON524 3G, Cat1 Chunghwa, FarEasTone, T Star, Taiwan Mobile
Tanzania MON524 2G, 3G, Cat1 Airtel
Thailand MON524 2G, 3G, Cat1 AIS, DTAC, True Move
Tunisia MON524 2G, 3G, Cat1 Orange Tunisie, Tunisie Telecom
Uganda MON524 2G, 3G, Cat1 Africell, Airtel, MTN
United Kingdom MON524 2G, 3G, Cat1 3, EE, Manx, O2, Sure, Vodafone
United States MON404 M1 AT&T, T-Mobile (USA), Verizon7
Vietnam MON524 2G, 3G, Cat1 MobiFone, Viettel, Vinaphone
Zambia MON524 2G, 3G, Cat1 Airtel

7Verizon in the United States is only supported on enterprise plans.


Ordering information

SKU Description Region Modem EtherSIM Lifecycle Replacement
MON404E01C01KIT Monitor One LTE CAT-M1 (NorAm, EtherSIM), Particle Transparent Enclosure, IO Card, Developer Edition [x1] NORAM BG96-MC GA
MON404E02C01KIT Monitor One LTE CAT-M1 (NorAm, EtherSIM), Particle Blue Enclosure, IO Card, Developer Edition [x1] NORAM BG96-MC In development
MON524E01C01KIT Monitor One LTE CAT-1/3G/2G (Europe, EtherSIM), Particle Transparent Enclosure, IO Card, Developer Edition [x1] EMEAA EG91-EX In development

†EMEAA: Selected countries in Europe, Middle East, Africa, and Asia, including Australia and New Zealand. See the cellular carrier list for more information.


Certification

FCC interference statement

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This device complies with Part 15, Part 15.247 of the FCC Rules. The FCC ID for this device is 2AEMI-MONEHDK.

This device must not be co-located or operating in conjunction with any other antenna or transmitter. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and receiver.
  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  • Consult the dealer or an experienced radio/TV technician for help.

To comply with FCC’s RF radiation exposure limits for general population/uncontrolled exposure, this device must be installed to provide a separation distance of at least 20cm from all persons.

WARNING: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

This device must not be collocated or operating in conjunction with any other antenna or transmitter.

ISED interference statement

ISED: 20127-MONEHDK

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:

  • this device may not cause interference.
  • this device must accept any interference, including interference that may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes:

  • l'appareil ne doit pas produire de brouillage, et
  • l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter, except tested built-in radios.

Cet appareil et son antenne ne doivent pas être situés ou fonctionner en conjonction avec une autre antenne ou un autre émetteur, exception faites des radios intégrées qui ont été testées.

This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

Cet équipement est conforme aux limites d'exposition aux rayonnements IC établies pour un environnement non contrôlé. Cet équipement doit être installé et utilisé avec un minimum de 20 cm de distance entre la source de rayonnement et votre corps.

EU declaration of conformity

We, Particle Industries, Inc., declare under our sole responsibility that the product, MON524E01C01KIT, to which this declaration relates, is in conformity with RED Directive 2014/53/EU and (EU) 2015/863 RoHS Directive 2011/65/EU (Recast).

The full text of the EU declaration of conformity is available at the following Internet address https://www.particle.io/.

Radiation Exposure Statement: This equipment complies with radiation exposure limits set forth for an uncontrolled environment.

The operating frequency bands and the maximum transmitted power limit are listed below:

  • BLE 2402-2480MHz, 10dBm
  • Wi-Fi 2.4GHz band 2412-2484MHz, 21.5dBm
  • LTE B1 B3 B7 B8 B20 B28 704.5-959.3MHz 1710.7-2687.5 MHz, 25dBm
  • WCDMA 882.4-957.6 MHz 1922.6-2167.4 MHz, 25dBm

United Kingdom

UKCA Conformity:

Radio Equipment Regulations 2017 (S.I. 2017/1206)

Product handling

ESD precautions

The Monitor One contains highly sensitive electronic circuitry and is an Electrostatic Sensitive Device (ESD). Handling an module without proper ESD protection may destroy or damage it permanently. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates the module. ESD precautions should be implemented on the application board where the B series is mounted. Failure to observe these precautions can result in severe damage to the module!

Battery warnings

CAUTION

RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.

  • Replacement of a battery with an incorrect type that can defeat a safeguard.
  • Disposal of a battery into fire or a hot oven, or mechanically crushing or cutting of a battery, that can result in an explosion.
  • Leaving a battery in an extremely high temperature surrounding environment that can result in an explosion or the leakage of flammable liquid or gas.
  • A battery subjected to extremely low air pressure that may result in an explosion or the leakage of flammable liquid or gas.

This symbol indicates DC voltage:

Disposal

This device must be treated as Waste Electrical & Electronic Equipment (WEEE) when disposed of.

Any WEEE marked waste products must not be mixed with general household waste, but kept separate for the treatment, recovery and recycling of the materials used. For proper treatment, recovery and recycling; please take all WEEE marked waste to your Local Authority Civic waste site, where it will be accepted free of charge. If all consumers dispose of Waste Electrical & Electronic Equipment correctly, they will be helping to save valuable resources and preventing any potential negative effects upon human health and the environment of any hazardous materials that the waste may contain.

Revision history

Date Author Comments
2022-10-24 RK For internal review only
2023-02-14 RK Updated diagrams
2023-06-07 RK Numerous updates
2023-06-13 RK Add Prototype Card, update card names
2023-06-20 RK Added photos
2023-07-17 RK Link to quick start, screw sizes
2023-09-01 RK Added battery specifications
2023-09-08 RK Added schematics
2023-10-18 RK Added FCC and ISED
2023-11-14 RK Renamed RS485 pins A and B instead of P and N
2024-01-29 RK Add battery warnings