Category: esp32

LoRa E32 device for Arduino, esp32 or esp8266 WOR (wake on radio) the microcontroller also and new Arduino shield 9

LoRa E32 device for Arduino, esp32 or esp8266: WOR (wake on radio) microcontroller and new Arduino shield – Part 6

Here a tutorial on E32 LoRa (Long Range) device very cheap and very long range (from 3Km to 8Km).
In this chapter we are going to wake on radio the LoRa E32 and microcontroller and we show the shield created for this device.


PCF8575 i2c 16 bit digital I/O expander

Library to use i2c pcf8575 IC with arduino and esp8266.

This IC can control (until 16) digital devices like button or led with 2 only pins.

Can read and write digital value with only 2 wire (perfect for ESP-01).

I try to simplify the use of this IC, with a minimal set of operation.