Is the HoneyPi and measuring mode or in maintenance mode? An LED light integrated in the housing can provide information about this. The light signals when switching between maintenance and measurement.
The pre-installed green LED on the Raspberry Pi indicates the following:
|maintenance mode (“HoneyPi”-WiFi avaiable)||💡 lights up|
|measuring mode||⚫ does not light up|
|Button is pressed||💡 lights up as long as the button is pressed|
|Raspberry is completely booted up||⚫💡⚫ 💡⚫💡⚫💡⚫ LED flashes|
|Button was pressed for a long time||⚫💡⚫💡⚫💡⚫💡⚫ LED flashes in very shot period. The Raspberry shuts down directly afterwards.|
The Raspberry Pi has already installed a very small light emitting diode. Therefore this additional LED is not absolutely necessary. However, it can be helpful if you want to give your housing this additional status indicator.
An LED can be connected to the GPIO21 (PIN 40). Once the maintenance mode is active, the GPIO21 will have approximately 3.3V.
- Pin 40/GPIO21
- Pin 30/GND
- For the other sensors see wiring diagram and sensors.
Required components for this extension:
Translated 11.08.2019 by JK