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    B4R Tutorial Node-Red MQTT controlling 8+8 digital Inp-Out and I2C ADC on ESP32

    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 read by ADC (ADS1115).