@rakwireless/adc121c021 1.0.0
A Node-RED node providing access to the ADC121C021 I2C analog to digital converter
@rakwireless/adc121c021
The node-red-contrib-adc121c021 node allows users to read analog inputs from adc121c021 and then convert them to digital readings.
Install from Node-RED
From within NodeRED, visit the top right menu, select Manage palette and then the Install tab. Look for @rakwireless/adc121c021 and install it.
Manual installation (development)
Please install @rakwireless/adc121c021 node with the following commands. If you use docker of Node-RED, you may need to replace ~/.node-red with /usr/src/node-red,
git clone https://git.rak-internal.net/product-rd/gateway/wis-developer/rak7391/node-red-nodes.git
then copy node-red-contrib-adc121c021 directory to the node_modules directory,
cp -rf node-red-nodes/node-red-contrib-adc121c021 ~/.node-red/node_modules
lastly, change to the node-red-contrib-adc121c021 directory and install the node,
cd ~/.node-red/node_modules/node-red-contrib-adc121c021 && npm install
Tips: After the installation of @rakwireless/adc121c021 is finished, please restart your node-red service. Otherwise, the node cannot be found/added to the new flow.
Usage
Tips: Please make sure that user has the permissions to access GPIO and i2c devices.
- adc121c021_i2c
To get the voltage reading from the adc121c021, user only need to define the i2c bus of the chip.
Name
Define the message name if you wish to change the name displayed on the node.
/dev/i2c-?
Default I2C Bus is 1. 1 is for '/dev/i2c-1'.
i2c_Address
The Address by default is set to 0x51, this is the I2C address of RAK12004. Please check adc121c021's datasheet for more information.
The output of the node is showed as follows.
{
i2c_address: 81
i2c_device_number: 1
Raw_value: 2350
Volts: "2.869"
}
Example
- rak12004-reading - Read smoke PPM using WisBlock sensor RAK12004.
- rak12009-reading - Read Alcohol Gas PPM Using WisBlock Sensor RAK12009.
License
This project is licensed under MIT license.
