# ADC Value in NodeRed
**URL:** https://discourse.nodered.org/t/adc-value-in-nodered/67363
**Category:** General
**Created:** [5 September 2022 20:46 UTC](https://discourse.nodered.org/t/adc-value-in-nodered/67363 "2022-09-05T20:46:58Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@LinkView\_Maze](https://discourse.nodered.org/u/LinkView_Maze)
#### Post date: [5 September 2022 20:46 UTC](https://discourse.nodered.org/t/adc-value-in-nodered/67363/1 "2022-09-05T20:46:58Z")
Hello
I have a python program in my raspberry.
```auto
from periphery import I2C
def get_adc_value():
# Open i2c-1 controller
i2c = I2C("/dev/i2c-1")
msgs = [I2C.Message([0x61]), I2C.Message([0x00,0x00], read=True)]
i2c.transfer(0x36, msgs)
adc_value = (msgs[1].data[0] & 0x0F) <<8 | (msgs[1].data[1])
# ATTENTION le 4.93 est la tension de ref mesurée à la main
# pas utile en mode ratiometrique
adc_value_volt=(adc_value*4.93/4096)
print("ADC VALUE P4.2: 0x{:04x} , {:0.2f}V".format(adc_value,adc_value_volt))
msgs = [I2C.Message([0x63]), I2C.Message([0x00,0x00], read=True)]
i2c.transfer(0x36, msgs)
adc_value = (msgs[1].data[0] & 0x0F) <<8 | (msgs[1].data[1])
adc_value_volt=(adc_value*4.93/4096)
print("ADC VALUE P6.2: 0x{:04x} , {:0.2f}V".format(adc_value,adc_value_volt))
i2c.close()
```
I want to integrate this function in my node red in order to have only one point of debug.
Can you tell me how to do it?
Thank You
---
### Author:  [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [5 September 2022 21:39 UTC](https://discourse.nodered.org/t/adc-value-in-nodered/67363/2 "2022-09-05T21:39:57Z")
Well you could call it from an exec node. python -u path-to/yourfile.py or did you want to implement it 100% in Node-RED using the i2c node ?
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### Author:  [@LinkView\_Maze](https://discourse.nodered.org/u/LinkView_Maze)
#### Post date: [5 September 2022 21:54 UTC](https://discourse.nodered.org/t/adc-value-in-nodered/67363/3 "2022-09-05T21:54:03Z")
I will integrate 100% in node red because the resut of msg does anaylsed in node red
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### Author:  [@Sean-McG](https://discourse.nodered.org/u/Sean-McG)
#### Post date: [5 September 2022 22:46 UTC](https://discourse.nodered.org/t/adc-value-in-nodered/67363/4 "2022-09-05T22:46:20Z")
If you look in the flows section and search for ADC you will find a number of nodes designed to read from ADC devices attached to a RPi.
eg [node-red-contrib-iiot-rpi-ads1115 (node) - Node-RED](https://flows.nodered.org/node/node-red-contrib-iiot-rpi-ads1115)
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [4 November 2022 22:46 UTC](https://discourse.nodered.org/t/adc-value-in-nodered/67363/5 "2022-11-04T22:46:47Z")
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