4-20mA Current Receiver to ESP32

Keltel · April 28, 2022, 8:00am

Hello,
I’m trying to interface the 4-Channel I2C 4-20mA Current Receiver Board w/ I2C Interface
to an ESP32 running Micropython. Does anyone know of a Micropython library for doing this?
Thanks

geraldinebc15 · April 29, 2022, 5:37pm

Hi @Keltel,

Unfortunately, there is no MicroPython library for that board. However the board is based on an MCP3428, so you could try using the Python library from this repository (with some modifications)

github.com

ControlEverythingCommunity/MCP3428/blob/master/Python/MCP3428_4Channel.py

# Distributed with a free-will license.
# Use it any way you want, profit or free, provided it fits in the licenses of its associated works.
# MCP3428
# This code is designed to work with the MCP3428_I2CADC I2C Mini Module available from ControlEverything.com.
# https://www.controleverything.com/content/Analog-Digital-Converters?sku=MCP3428_I2CADC#tabs-0-product_tabset-2

import smbus
import time

# Get I2C bus
bus = smbus.SMBus(1)

# MCP3428 address, 0x68(104)
# Send configuration command
#		0x10(16)	Continuous conversion mode, Channel-1, 12-bit Resolution
bus.write_byte(0x68, 0x10)

# MCP3428 address, 0x68(104)
# Read data back from 0x00(0), 2 bytes
# raw_adc MSB, raw_adc LSB

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Keltel · May 2, 2022, 10:53am

Hi, thanks for your response. I’ve now found a library similar to the one you suggested and got it working.