Sensor

My next addition to previous projects Battery Powered Wifi IoT - Temperature, Humidity & Soil Moisture Sensors and Battery Powered ESP8266 IoT & Temperature Sensor is to make wifi configuration smooth and fast.

My new project consists of HW with cost under 20€. It is able to accurately measure electric power consumption and sends data via WiFi. Great source of knowledge is openenergymonitor.org which includes also Arduino library.

I have just made a prototype of ESP8266 (ESP-01) IoT temperature & humidity SI7021 sensor and also 2x three pin soil moisture sensors with only 0.006mA (6µA) current drain during the sleep.

I have several IoT sensors at home and now I came to the point that I would like to introduce some solid platform for storing sensor data and visualizing them. This post summarize all platforms that I tried, searched and evaluated.

I successfully run DHT22 battery ESP8266 temperature/humidity IoT sensor so my next project is a simple IoT Door Sensor. It is up and running and sending a simple event to my HTTP server via wifi chip ESP8266 (ESP-01 in my case). HTTP server is serving simple php script, that stores the data locally and also sending events to DWEET.IO and also sending email via Amazon SNS (AWS CLI api).

Since my latest ESP8266 temperature humidity IoT logger project is up and running I have decided to cut the last wire – power. There are more approaches how to make ESP8266 running on a battery, but why not to have a unique one… 😎
The idea is to use only 5µA AtTiny13A (5 microA 2-3V) during the idle time to decouple all other components from batteries! So really 0 power usage from all other components (power regulator, DHT22 sensor,..), since the more components the more idle power consumption. All other circuits should wake up only during limited time and then again turn off.