Putting RAK4200 into sleep doesn’t get the module into the sleep current as advertised.
It is around 40 uA. Upon checking all the pins on RAK4200 during sleep, I notice the following pins are floating during sleep:
3 - UART2_DE
4 - UART1_TX
6 - UART1_DE
9 - I2C_SCL
10 - I2C_SDA
16 - SPI_MISO
But, the biggest culprit among them is pin 16 (SPI_MISO). If I were to put a multimeter to measure the voltage of this pin 16, the extra 40 uA will disappear. Firmware revision is v3.0.12.
Hi @Sucre, module + board. Prior to this, RAK4200 was not mounted to ensure nothing is wrong with circuits. Base board current is 7 uA. Adding the RAK4200 shoot up to more than 50 uA. Those RAK4200 pins (3, 4, 6, 9, 10, 16) I mentioned are not connected to anything on the board as they are not needed. The fact that they have voltages other than GND and 3.3V, it means they are floating.