integrated cellular board

TAT image

General Information

Microcontroller ESP32
Modem GSM / NB-IoT / LTE-M (Nano-SIM)
GNSS GPS, BeiDou, Galileo, GLONASS and QZSS
Supported Sensors Load Cell, Temperature, Humidity
Power Supply USB, Battery, Solar Panel
Misc Switches / Headers for firmware flashing and debugging
Support for external switch
Software micropython
Open-source libraries & demo scenarios @ Github
Weigh Scale calibration web-based wizard
Dimensions (L x W x H) (+ WiFi antenna) 78 (83.5) x 57.2 x 16.7 mm
Weight 25 g
Enclosure IP65/IP67

Example Applications

  • Beehive monitoring
    • Weight, Temperature, humidity
  • Environmental monitoring
    • Air quality, Temperature, humidity
  • Asset tracking
    • Location, Speed, Temperature, humidity

Sensors Support

On-board Sensors Temperature/Humidity Sensor (based on the SHT40 chip)
On-board Sensor Circuit ADC and amplifier for load cell sensors
External Sensor Interfaces Analogue / Digital: 1-wire @ 3.3V (3-Pin)
Load Cell (5-Pin)
Fixed Terminal Block with push-in connection (no tools required)


  • Wireless technologies
    • WiFi
    • Bluetooth
    • GSM / NB-IoT / LTE-M
  • Transport protocols
    • TCP/UDP over IPv4/IPv6
    • MQTT
    • CoAP

Power Supply

USB Port Input Voltage
Micro USB Min. Typ. Max. Units
4.5 5 5.5 V
Battery Port Nominal Characteristics
JST 1 x Rechargeable LiPo 1S1C 3.7-4.2 V
Solar Panel Port Input Voltage
Fixed Terminal Block with push-in connection (no tools required) Min. Typ. Max. Units
5.5 6 6.5 V

Operating Conditions

Microcontroller Operating Voltage 3.3 V
Charging Current Limit 440 mA
Maximum Drawn Current 3 A
Operational Temperature 0 – 60 C
Charging Temperature 0 – 60 C

Charging State Indication (LEDs)

Charge cycle state LCR LED
No input OFF
Temperature fault BLINKING
No battery BLINKING
Charging ON
Charge complete OFF


Switch Name Details
S1 Controls power supply to the micro-controller (the battery charging process is not affected)
S2 Tactile switch for resetting the micro-controller
S3 Tactile switch for activating the micro-controller’s bootloader (needed only for fw upgrade)
EXT SW External latching switch to control micro-controller’s power (the battery charging process is not affected)
SNSR Electronic software-controlled switch for enabling/disabling power supply to sensors on-demand

Switch combinations & power supply

External switch (EXT SW) On-board switch (S1) Circuit
Open ON ON
Closed ON ON
Closed OFF ON

Energy Consumption Profiling

Battery Voltage Accurate Measurement of battery voltage even at charging state

External components required/recommended

  • Battery
    • 2200-4000 mAh
  • Solar Panel
    • 6V/1-2W
  • Flexible Cellular Antenna
  • Flexible GPS Antenna
  • SIM card


CE planned
FCC planned
RoHS planned

Custom designs

The existing boards are highly configurable and expandable so if the existing boards do not fit your need, get in contact with us and we will tailor a solution for you with your customizations.