Example: GPIO

This test code shows how to configure gpio and how to use gpio interrupt.

GPIO functions:

• GPIO18: output
• GPIO19: output
• GPIO39: input, pulled up, interrupt from rising edge and falling edge
• GPIO36: input, pulled up, interrupt from rising edge and falling edge

Test:

• Connect GPIO18 with GPIO39
• Connect GPIO19 with GPIO36
• Generate pulses on GPIO18/19, that triggers interrupt on GPIO39/36

Deep sleep:

Wake is triggered automatically switching trigger pin on each boot (GPIO36/39). It is detectable by the increment of the printed variable [BOOT COUNT "bootCount"].