This example shows how to use the Analog to Digital Converter (ADC) functionality of a module
The example is developed on the basis of standard firmware. The added code is in the comment range of /* User Code */ and /* End User Code */.
This demonstrates how to assign a pin to enable ADC functionality. Once it was successfully initialized, the voltage value at the set pin will be printed to the serial port.
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Assigning a pin to enable ADC function
Example: Using Pin #4
gpio_adc.pin_num = 4 \\Pin #4 ADC enabled -
Based on testing, difference between the actual voltage and the printed voltage to the serial port is within 50mV (for RAK811 module)
Pin support for different modules:
for RAK811(L)： 2，3，4，5，15，20，22，23
for RAK811(H)： 2，3，4，20，22，23