Overview

ESP8266 DHT sensor probe that pushes readings to influxdb

Build requirements

• PlatformIO
• ESP8266 board (only tested with D1 Mini)

Connections diagram

Usage requirements

• influxdb accessible from the wifi network where the probe connects to

Required build flags

• WIFI_SSID - wifi ssid

• WIFI_PASSWD - wifi password

• INFLUXDB_URI - influxdb write endpoint url, as in http://INFLUXDB_HOST:INFLUXDB_PORT/write?db=INFLUXDB_DB

• INFLUXDB_TAGS - influxdb tags to use for all readings. Use "" if none is needed. Be careful with length! Internal string buffer is 128 bytes.

• DEEPSLEEP - Time to deep sleep (usecs). 15e6 is 15 seconds

  Note: these flags can be defined in platformio.ini and/or defined as environment variables before calling platformio.

Building

PLATFORMIO_BUILD_FLAGS='-DWIFI_SSID=\"MY_SSID\" -DWIFI_PASSWD=\"MY_PASSWD\" -DINFLUXDB_URI=\"http://INFLUXDB_HOST:INFLUXDB_PORT/write?db=INFLUXDB_DB\" -DINFLUXDB_TAGS=\",KEY1=VALUE,KEY2=VALUE\" -DDEEPSLEEP="15e6"' platformio run

Uploading

PLATFORMIO_BUILD_FLAGS='-DWIFI_SSID=\"MY_SSID\" -DWIFI_PASSWD=\"MY_PASSWD\" -DINFLUXDB_URI=\"http://INFLUXDB_HOST:INFLUXDB_PORT/write?db=INFLUXDB_DB\" -DINFLUXDB_TAGS=\",KEY1=VALUE,KEY2=VALUE\" -DDEEPSLEEP="15e6"' platformio run -t upload