Teapotlabs Feather RAK3172

Warning: The current Rev 9 board has the polarity of LED D1 reversed, preventing the LED from functioning.

Quick Fix: Resolder and rotate the LED 180 degrees to correct the polarity.

Teapotlabs Feather RAK3172 a Low-cost, Low-power LoRaWAN development board that breaks out RAKwireless RAK3172 to an Adafruit Feather-compatible format.

Based on the RAK3172, a STM32WLE5CC based module with ARM Cortex M4 processor, 48 MHz and 3.3V logic. The chip has a 256K of flash and 64K of RAM. With low-power application in mind, the board is capable to be in sleep mode for as low as 11uA, it also has a built-in voltage divider to sense battery voltage and battery charger.

Teapotlabs Feather RAK3172 is part of Teapotlabs open-hardware project and is heavily inspired by Penguino STM32WL LoRa-E5 and BastWAN-WLE projects!

Specification

• RAK3172: An STM32WLE5CC module at 915MHz
• 3.3V only power/pin.
• Down to 11uA Deep-Sleep
• Switchable TX Power. 14 dBm or 22 dBm on 915MHz frequency
• Supports LoRaWAN 1.0.3
• USB-C for Arduino and Mbed OS/STM32Cube programming
• SMA antenna connector
• JST-PH 2-Pin Battery Connector
• Built-in LiPo Charger ( 200mA Charge Rate )
• Voltage-Divider for Battery Monitoring ( default: disabled )
• LED Indicator on pin 8 ( default: disabled )
• Compatible with many Adafruit FeatherWings
• 1A Max VCC power output

Power Consumption 

Power consumption measured using Nordic PPK2. The following are the summary of the measurement:

• Sleep and all jumper disabled (JP1 - JP6): 10.44 uA
• Sleep and UART-Bridge enabled ( JP3, JP5, and JP6 ): 23.76 uA
• Sleep, UART-Bridge and Battery Sense enabled ( JP1, and JP3 - JP6 ): 25.41 uA
• Transmit at 14 dBm: 40.45 mA
• Transmit at 20 dBm: 100.38 mA

More detailed measurement can be found here

Teapotlabs Feather RAK3172 is a feather compatible board, and hence is compatible with the many available FeatherWing.

The following are a example project that uses multiple FeatherWings.

An over-engineered clock with main purpose to showcase FeatherWings compatibility. FeatherWings and sensors used:

• Ultimate GPS
• Tri-Color E-Ink
• Qwiic Shield
• BME680
• Modified E-Ink Case

           

Front and Side View

What's Included

• 1x Teapotlabs Feather RAK3172 ( 915MHz )

More information can be found at Teapotlabs Feather RAK3172 Github page!