Main Board

1st version (part of certified bundle) Latest version
shield sensor enviro shield sensor enviro

General Information
Versions v2.0.1 (latest development version, certification pending)
v1.0.5 (part of a certified bundle)
Microcontroller Espressif ESP32-S3 Module
Connectivity WiFi, Bluetooth, NB-IoT/LTE-M with GSM fallback (Nano-SIM Holder)
GNSS Embedded GPS, BeiDou, Galileo, GLONASS and QZSS
Power Supply Battery (primary & rechargeable), USB, Solar Panel
Onboard Sensors Temperature/Humidity (in all versions) and Accelerometer (only in v2)
Debugging Serial Port (UART) or USB for Debugging (in all versions)
Recovery External Clock (RTC) for maintaining timing during power failure (only in v2)
Switch Internal switch & support for external switch
Indicators Various LEDs
Software & Tools Micropython
Open-source libraries & example scenarios @ Github
Local Web Configurator through WiFi
Dimensions (L x W) 77.47 (83.5*) x 62.23 mm (* with embedded wifi antenna)
Weight 28 g
Deep Sleep Current 100 uA [v1] / 70 uA [v2] (typical)
SKU INS-B-MAN

Micro-Controller
Model ESP32-S3-WROOM-1
Flash 8 MB/4 MB (Embedded)
Memory RAM 2 MB (Embedded)

Power Supply

Source Version Port Input Voltage Range
Battery All JST 1 x Rechargeable LiPo/Li-Ion 1S1C 3.7-4.2 V
Solar Panel v1 Terminal Block Min: 5.5 V, Typical: 6 V, Max: 7 V
v2 Detacheable Plug Min: 4 V, Typical: 6 V, Max: 18 V
USB v1 Micro Min: 4.5 V, Typical: 5 V, Max: 5.5 V
v2 Type-C Min: 4.5 V, Typical: 5 V, Max: 5.5 V

Connectivity
WiFi & Bluetooth Embedded on Micro-controller
Cellular (NB-IoT/LTE-M/GSM) Quectel BG600 Modem

Operating Conditions
Microcontroller Operating Voltage 3.3 V
Rated Supply Voltage/Current Battery: 3.6-4.2 VDC 3A
v1: DC-IN (Solar Panel): 6VDC 440mA
v2: DC-IN (Solar Panel): 18VDC 440mA
DC-IN (USB) 5VDC 440mA

Switches
S1 Controls power supply to the micro-controller (the battery charging process is not affected)
S2 Tactile switch for rebooting the micro-controller
S3 Tactile switch for activating the micro-controller’s bootloader (needed only for fw upgrade)
J4 Port for connecting external switch

For controling the board using the External Switch, S1 (internal switch) should be in OFF state. If S1 is in ON state, the external switch is bypassed.

Indication LEDs

Charging State Indication (RED LED)

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

Modem State Indication (RED LED)

Modem state LCR LED
Disabled OFF
Network Search BLINKING SLOWLY (OFF most of the time)
Idle BLINKING SLOWLY (ON most of the time)
Transferring Data BLINKING QUICKLY

Operational State Indication (RGB LED)

RGB LED Color & Status Operational
blinking random colors File system optimization procedure (firmware version v2.11.0+)
blink white Initializing device
blinking purple Web UI waiting for client (only after hard reboot)
solid purple Web UI with connected client (only after hard reboot)
solid blue Executing enabled measurements
solid red Connecting to network
solid green Network connected, uploading data
solid yellow Uploading data failed
off Deep sleep

On-board diagnostics & debug
Battery Voltage Accurate Measurement of battery voltage even at charging state
Environment Conditions 1 × on-board temperature/humidity Sensor (based on the SHT40 IC)
Movement 1 x on-board accelerometer (based on the LIS2DW12 IC) - only in v2
Location Through embedded GPS (only works outdoors)
Debug Port J5 Standard Serial Port (needs an external USB-to-Serial adapter to connect to PC)
Debug Port J2 Standard Serial Port
Timing Recovery External RTC powered by the battery. In case of modem/power failure it can keep the timing. Resets if battery removed - only in v2

Special Configurations
Bypass Charger (only in v1) By default R20 (0 Ohm) is not mounted and R15 (0 Ohm) is mounted. In case you need to bypass the charger and power the board solely through a battery then R15 should be removed and R20 should be mounted
Micro-controller Power Line Break By default R26 (0 Ohm) is mounted. In case you need to break the micro-controller’s power line (e.g. for adding a special circuit like a watchdog) then this should be removed

Protection
Overcurrent 4 x Resettable Fuses for battery, solar panel, USB port, and 3.3V regulator paths
Charge at low/high temperatures 1 x Thermistor disabling charging beyond temperature limits

Expansion Ports

Sensor Expansion Port
Port J9-J10
Type 1 x Single-Row & 1 x 2-row 10-pin Female Socket Header
Usage Attach insigh.io sensor shields or custom applications in breadboards

Connectivity Expansion Port
Port J3
Type 1 x Custom 10-pin Connector (Part number: 90325-0010) compatible with Ribbon Flex Cable (Part number: 92317-1012)
Usage Attach insigh.io connectivity shields

Pinouts

Sensor Expansion Port

J9 J10(L) J10(R)
IO2 IO40 IO35
IO1 IO18 IO36
V_SW IO17 IO37
GND IO11 IO41
3.3V IO9 IO42
GND IO8 IO43
3.3V IO7 IO44
V_ESP IO6 IO48
GND IO5 SCL
S_GND IO4 SDA

Orientation as in the board picture. IOs naming refer to corresponding ESP32-S3-WROOM-1 IOs.

  • Power Pins (Output Only)

    • 3.3V : Constant 3.3V Output from LDO used also to power the micro-controller
    • V_SW : Internal switch output voltage before the regulator (post-charger output)
    • V_ESP : Used for breaking the micro-controller’s power line if needed (see custom configurations)
    • GND : Common Ground
    • S_GND : Electronically-controlled Ground Pin (ground switch through IO12)

  • Other Sensor/Control Pins (Input/Output)

    • SCL (IO38) : I²C Control Line (Already Pulled-up)
    • SDA (IO39) : I²C Data Line (Already Pulled-up)
    • IO43 : UART TXD0 for Debugging/Firmware Flashing using USB-to-Serial Cable (also exposed in separate header “J5”)
    • IO44 : UART RXD0 for Debugging/Firmware Flashing using USB-to-Serial Cable (also exposed in separate header “J5”)
    • IO4-9 : General I/O, can be used as ADC pins
    • All other pins, except reserved pins mentioned below, can be freely used as digital IOs and power pins with low (up to a few mA) current requirements

  • Reserved Pins (Used for internal purposes only)

    • IO3 & IO14 : Measure the battery state (voltage)
    • IO12 : Control (Enable/Disable) the additional ground pin (S_GND)
    • IO21 & IO47 : Control (Power/Set) the RGB LED
    • IO10 & IO13 : Control (Reset/Enable) the Cellular Modem
    • IO15 & IO16 : Serial (UART) Pins for communicating with the Cellular Modem
    • IO19 & IO20 : D-/D+ pins for native USB control

Connectivity Expansion Port

J3
1 GND
2 3.3V
3 IO40
4 IO18
5 IO35
6 IO36
7 SDA
8 UART1_TX
9 SCL
10 UART1_RX
  • GND: Common Ground
  • 3.3V: Used for powering the modem of the shield
  • IO40, IO18, IO35, IO36: Free digital pins to use in the shield as input/output
  • SDA/SCL: Exposed I²C bus to accomodate compatible devices
  • UART1_TX/UART1_Rx: Exposed Serial Bus to accomodate compatible devices (modem, GPS, etc.)

Cerfification
CE Latest v1 version is part of a certified bundle. EU Declaration of Conformance is available upon request.
Certification for v2 is ongoing

Changelog

Version Release Date Comments
2.0.1 08/02/2026 Minor component alignments
2.0.0 (Major Revision) 21/12/2025 DC input for solar port extended to 18V, accompanied by power path redesign and new charging IC
Integration of dedicated RTC and Accelerometer
Ports change: USB port changed to Type-C & Solar/Switch connector changed to detacheable
Improvements in power consumption
1.0.5 08/12/2025 Part of a certified bundle; Correct footprint of fuse
1.0.4 05/03/2025 Change resettable fuses to tolerate higher voltages
1.0.3 20/08/2024 Minor mechanical changes (holes standoffs)
1.0.2 31/12/2023 Fix increased deep sleep current due to external switch pulled down resistor
1.0.1 17/03/2023 Added resettable fuses to solar panel, battery and the output of the 3.3V regulator; Change connector for connectivity shield
1.0.0 29/06/2022 First stable version with ESP32-S3 & Sensor Expansion Port