iC880A LoRaWAN Gateway Backplane

Description

This is an adapter board to connect an IMST iC880A-SPI LoRaWAN concentrator board to a 40-pin Raspberry Pi (2B / 3B / Zero). It also gives you some ways to enhance and monitor your gateway.

Power supply
Screw terminal for direct power input / output (5V)
Screw terminal with on-board MP1584 step-down regulator (6.7-28V input, fixed 5V output). Great to connect a PoE-Adapter.
Polyfuse and TVS diode to protect against voltage spikes
Protection against accidentally reversed polarity

Sensors for monitoring
Sensation SHTC3 temperature / humidity sensor made in Switzerland (accuracy: ± 2%RH, ± 0.2 ° C)
Microchip MCP3425 16-bit ADC to monitor input voltage

I / O
Programmable button connected to GPIO (eg to shut down the Pi)
Three programmable LEDs (Red / Yellow / Blue) connected to GPIO header
1 female pin header for serial communication (RX / TX)
2 female pin headers with pull-ups for I²C based sensors (SDA / SCL / GND / 3.3V / 5V)
Full access to Raspberry Pi GPIO header

Cooling
MOSFET with flyback diode for connecting and regulating a 5V DC fan

Mechanical
Mounting holes for Raspberry Pi 2B / 3B / Zero (two nylon spacers included)