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@redplc/node-red-rpi-ads1115

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Node-RED node for ads1115 16bit adc using with redPlc nodes.

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# @redplc/node-red-rpi-ads1115 [![platform](https://img.shields.io/badge/platform-Node--RED-red)](https://nodered.org) [![platform](https://img.shields.io/badge/platform-redPlc-ffa500)](https://flows.nodered.org/node/@redplc/node-red-redplc/) [![platform](https://img.shields.io/badge/platform-Raspberry--Pi-ff69b4)](https://www.raspberrypi.com/) Node-RED node for [ads1115](https://www.ti.com/product/ADS1115) 16bit adc using with [redPlc](https://www.npmjs.com/package/@redplc/node-red-redplc/) nodes ## ads1115 analog to digital converter - 16bit Conversion Resolution. - Four Analog Inputs. - Each input can be selected Single-Ended, Differential or Disabled. - Internal Voltage Reference. - Internal Oscillator. - Programmable Data Rate 8 SPS to 860 SPS. - The PGA offers input ranges from ±256 mV to ±6.144 V. - I2C Interface with Four Pin-Selectable Addresses. ## Usage - Install [redPlc](https://www.npmjs.com/package/@redplc/node-red-redplc/) nodes. - Use redPlc s-inject node for trigger update. - Connect to first output on s-inject node. - Daisy chain nodes in series. - For logical operations use redPlc nodes. - Data is exchanged with global context variable arrays. - Array index is equal input number for easy handling. - This node works on Raspberry Pi with 32bit or 64bit OS. - Input voltage more than VCC can damage adc input. - The output value is mV or adc raw data. - Works also on Raspberry Pi 5 - Enable I2C with raspi-config. - In this case i2c-1 is enabled. - If you use i2c-0 port add<br> **dtparam=i2c_vc=on**<br> to /boot/config.txt,<br> then Pin27=SDA, Pin28=SCK.<br> - For other ports add this to /boot/config.txt. ## Array Index Mapping |Input|Array-Index| |:----|:---:| |A0|0| |A1|1| |A2|2| |A3|3| ## Address Pin Connection To |I2C Address|ADDR Pin| |:----|:---| |48H|GND or open| |49H|VCC| |4AH|SDA| |4BH|SCL| ## Example This example gets voltage and current from ADC and displays on Dashboard.<br> The module node ads1115 is set for input A0 and A1 to Input-Range 2048mV.<br> Other adc inputs are disabled.<br> 2048mV is equal 50V on input A0 and 5A on input A1.<br> In rung **01** the adc values are scaled to voltage and current<br> and stores in analog variable MA0.0 and MA0.1.<br> Input scale MIN is **0** and **MAX** is 2048.<br> Output scale MIN is **0** and **MAX** is 50 (V) for voltage (input A0).<br> Output scale MIN is **0** and **MAX** is 5 (A) for current (input A1).<br> The redPlc export nodes reads the analog variables and sends to Dashboard gauge.