Custom Shelly Pro 2 App

This repository contains a custom app for the Shelly Pro 2. It is based on ESP IDF SDK.

The app uses Wifi, MQTT, OTA and OneWire for DS18B20 sensors. Ethernet via LAN8720 is not implemented because it is currently not required.

Flashing

❗ The device ground is wired to the L connector, risk of shock due high voltage. ❗

I recommend to flash the device without power connected by using power supply via flash connector.

At the side of the module is a 7 pin 1.27 mm connector.

                 +------+
                 |      |
       +---------+      |
       |                |
+------+                |
|        # GND          |
|        # FLASH/GPIO0  |
|        # RESET        |
|        # 3.3 V        |
|        # RX           |
|        # TX           |
|        # 12 V         |
|                       |
|                       |
+------+                |
       |                |
       +---------+      |
                 |      |
                 +------+

Hardware

Jumper 2: Input pins

3.3 V	GPIO 38
GPIO 39	GND

Jumper 3: Power supply

12 V	GND
12 V	GND

Jumper 4: Relay 1 Connector

3.3 V	GPIO 12	GPIO 14	GPIO 13	GPIO 0	GPIO 16
GND	QA	GPIO 2	GPIO 36	12 V	GPIO 32

• GPIO 36: 10k NTC (10k V-Div, B-Const: 3350)
• QA: SN74HC595B

Jumper 5: Relay 2 Connector

3.3 V	GPIO 12	GPIO 14	GPIO 13	GPIO 15	GPIO 34
GND	QB	GPIO 2	GPIO 37	12 V	GPIO 33

• GPIO 37: 10k NTC (10k V-Div, B-Const: 3350)
• QB: SN74HC595B

Hardware Mods

WIP