4-20ma

1/2 channel 4-20 mA to voltage converter boards using LMP8640 current sense monitor.

Universal Sensor data transporter over MQTT. Sensor like water flow sensor (=pulse-counter), DS18B20 , INA219, 4-20mA, PMS5003, ...

4-20 mA sensor simple Arduino example

IoT device to enable 4-20mA sensor communication with a MQTT broker

Digital 4-20ma Current Loop Transmitter

Industrial Data Acquisition Platform

Interfaceamento de Transdutor 4-20mA com Resistor 250r e Arduino.

Interfaceamento de Transdutor 0-20mA com Resistor 250r e Arduino.

ESP32 industrial telemetry reference: 4–20 mA acquisition, ADS1115, LoRa-E5 uplink, bounded retries, compact payloads, and deep-sleep cycles.

Web-based Modbus test tool for the FNIRSI SG-004A, featuring measurements, signal generation, trend recording and serial diagnostics.

Read a JUJIE MF30 micro thermal mass flow meter on ESP32 using the 4-20mA current loop, with calibrated ADC readings, shunt-resistor wiring, and PlatformIO/Arduino example code.

ESP8266 Analog distance meter

4-layer industrial IIoT sensor node. 24 V field power, 2 x 4-20 mA loops, opto inputs, relay out, galvanically isolated RS-485 to a PLC, ESP32-C6 with a 50 ohm RF feed.

Datalogger para registro e transmissão de dados via satélite.

Single-channel industrial 4-20 mA current-loop reader for ESPHome / Home Assistant. ESP32-S3 + INA226, USB-C powered, 24 V loop supply with a constant-current limiter. KiCad 10, generated from Python. Rev G: routed, JLCPCB package included; not yet built.

Manipulação de saída 4-20mA em microcontroladores