ESP8266 Current Cost Envi

Background Info

This project is an implementation of an ESP8266 interface to a Current Cost Envi power monitor (https://hackaday.io/project/8232-live-wire-esp8266envi). It was written before features like SPIFFS were available, so it has much room for improvement. It also includes a DHT22 temperature/humidity device.

At this point, the hardware/code has been running about 6 months (466K samples stored on thingspeak.com).

Goals

1. Interface to Current Cost Envi
2. Interface to DHT22
3. Save samples to thingspeak.com

Dependencies

• ESP8266 Arduino library

• Other libraries

  • Time (https://github.com/PaulStoffregen/Time)

  • DHT (https://github.com/adafruit/DHT-sensor-library)

Hardware Programming and Operation

0. use Arduino IDE or VSMicro to compile and upload code; my setup:

• /libraries directories in ../Arduino/libraries directory
• /espcc files in a main project (../espcc) directory

0. serial console output (Serial1) for debug/monitoring

Testing

Send a sample at 57600 to UART0:

<msg><src>CC128-v0.15</src><dsb>01790</dsb><time>18:41:25</time><tmprF>74.0</tmprF><sensor>0</sensor><id>03764</id><type>1</type><ch1><watts>00655</watts></ch1><ch2><watts>00532</watts></ch2></msg>

Examples

http://192.168.0.105/api/system
{
"started":1463212161,
"samples":2350,
"bad":22,
"skipped":352,
"truncated":0,
"failedConnects":0,
"failedPosts":0,
"timeoutPosts":394
}

http://192.168.0.105/api/last
{
"id":4675,
"ts":1463227764,
"watts1":629,
"watts2":624,
"temp":71.40,
"dhtT":69.98,
"dhtH":35.90
}