# Node-Red MQTT controlling 8+8 digital Inp-Out and I2C ADC on ESP32

**URL:** <https://discourse.nodered.org/t/node-red-mqtt-controlling-8-8-digital-inp-out-and-i2c-adc-on-esp32/64348>\
**Category:** General\
**Tags:** mqtt\
**Created:** [25 June 2022 09:29 UTC](https://discourse.nodered.org/t/node-red-mqtt-controlling-8-8-digital-inp-out-and-i2c-adc-on-esp32/64348 "2022-06-25T09:29:36Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Kulle](https://avatars.discourse-cdn.com/v4/letter/k/50afbb/32.png) [@Kulle](https://discourse.nodered.org/u/Kulle)\
**Post date:** [25 June 2022 09:29 UTC](https://discourse.nodered.org/t/node-red-mqtt-controlling-8-8-digital-inp-out-and-i2c-adc-on-esp32/64348/1 "2022-06-25T09:29:36Z")

</div>

Hi  
Here a sample program on connecting ESP32 to node-red via MQTT.  
The ESP32 source program is in B4R, with a "compilation" for Arduino.

> **[Node-Red MQTT controlling 8+8 digital Inp-Out and I2C ADC on ESP32](https://www.b4x.com/android/forum/threads/node-red-mqtt-controlling-8-8-digital-inp-out-and-i2c-adc-on-esp32.141371/)**
>
> Hi
> Here a sample program to control/monitor 8+8 digital Out-Inp, plus an I2C ADC.
> The program use the MQTT protocol. 
> This program is an evolution of the previous one I posted.
> 
> This version add the monitor of 8 digital Input and four analog input...

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [24 August 2022 09:29 UTC](https://discourse.nodered.org/t/node-red-mqtt-controlling-8-8-digital-inp-out-and-i2c-adc-on-esp32/64348/2 "2022-08-24T09:29:40Z")

</div>

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.