Node-Red node for mcp3424 analog to digital converter.
Install with Node-Red Palette Manager or npm command:
cd ~/.node-red
npm install @iiot2k/node-red-mcp3424
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mcp3424 18bit analog to digital converter
- 12..18bit Conversion Resolution.
- Four Analog Inputs.
- Internal Voltage Reference.
- Internal Oscillator.
- Programmable Resolution with Data Rate 3.75 SPS (18bits) to 240 SPS (12bits).
- The PGA offers input ranges from ±256 mV to ±2048 V.
- I2C Interface with eight Pin-Selectable Addresses.
- Works also for mcp3421..mcp3428.
Node mcp3424 reads single adc input.
Node mcp3424-m reads multiple adc inputs.
- This node works on Raspberry Pi with 32bit or 64bit OS.
- The output value is mV or adc raw data.
- Enable I2C with raspi-config.
- In this case i2c-1 is enabled (port=1).
- If you use i2c-0 port add
dtparam=i2c_vc=on
to /boot/config.txt,
then Pin27=SDA, Pin28=SCK.
- For other ports add this to /boot/config.txt.
| I2C Address | ADR0 Pin | ADR1 Pin |
|---|---|---|
| 68H | Open | Open |
| 68H | GND | GND |
| 69H | GND | Open |
| 6AH | GND | VCC |
| 6BH | VCC | GND |
| 6CH | VCC | Open |
| 6DH | VCC | VCC |
| 6EH | Open | GND |
| 6FH | Open | VCC |
| Type | # Channel | Max. Resol. | Address-Range |
|---|---|---|---|
| mcp3421 | 1 | 18bit | 68H |
| mcp3422 | 2 | 18bit | 68H |
| mcp3423 | 2 | 18bit | 68H-6FH |
| mcp3424 | 4 | 18bit | 68H-6FH |
| mcp3425 | 1 | 16bit | 68H |
| mcp3426 | 2 | 16bit | 68H |
| mcp3427 | 2 | 16bit | 68H-6FH |
| mcp3428 | 4 | 16bit | 68H-6FH |