Onion Wemos 1D mini temperature humidity wireless sensor

thingiverse

## A handy little hygro and thermo - meter with OLED 0.66" 64x48 display and DHT11/DHT22 humidity and temperature sensor. There was a bug in the wemos.ino.txt so please download again or just initialize the sensor in setup by inserting line: dht.begin(); This whole set is based on Wemos 1D mini controller with 0.66" OLED shield and DHT11/DHT22 sensor shield all for less than $9 from links at the bottom. It can be used as a standalone version just to display data or as a wireless sensor logging to server via WiFi. Screen display legend by line: 1. Humidity in percentage 2. Temperature in Celsius degrees (can be changed to Fahrenheit) 3. Current time - while connected 4. WiFi signal strength in dBi and two last segments of assigned IP address - while connected 5. Humidity bar - 0 - 100 % 6. Temperature bar - 0 - 40 degrees (it will not look nice with sub zero reading due to lack of space) In the below example is the code for Wemos 1D Mini and PHP receiving script along with RPImonitor who gathers and displays the data. #Installation instruction: ##Hardware: Print, sand, use some hot glue to attach the screen to the shell and to glue them together. ##Software: Requirements: none for standalone version www + php server - in my case Lighttpd + PHP on Raspberry Pi 3+ software for analyzing data - in my case RPIMonitor does the job wemos.ino.txt - a complete Arduino code to be uploaded to your Wemos 1D - note that some changes like server ip have to be made to make it work receive.php.txt - a file that receives the data on the server, it creates two files which stores last received value from the sensor. Do not forget to set the right permissions: sudo chown www-data:www-data receive.php sudo chmod 755 receive.php sudo usermod -a -G www-data pi // to add pi user to www-data ##RPIMonitor configuration for the Raspberry Pi 3+ setup: /etc/rpimonitor/templates/temperature.conf ###reads the most recent value for temperature dynamic.17.name=remote_temp dynamic.17.source=/var/www/html/temperature.dat dynamic.17.regexp=(\d+\.\d+) dynamic.17.postprocess=sprintf("%.3f", $1) dynamic.17.rrd=GAUGE ###and humidity dynamic.18.name=remote_hum dynamic.18.source=/var/www/html/humidity.dat dynamic.18.regexp=(\d+\.\d+) dynamic.18.postprocess=sprintf("%.3f", $1) dynamic.18.rrd=GAUGE ###and shows them as text web.status.1.content.4.line.2=data.remote_temp+" | "+data.remote_hum ###and displays them on the graph web.statistics.1.content.8.graph.3=remote_temp web.statistics.1.content.9.graph.4=remote_hum ###under the given names web.statistics.1.content.8.ds_graph_options.remote1.label=Remote temp *C web.statistics.1.content.9.ds_graph_options.remote1.label=Remote hum % ##be sure to update line and content numbers accordingly #If you like it you can order the needed parts here: Wemos 1D Mini -> http://s.click.aliexpress.com/e/bIteLhb2 Oled Shield -> http://s.click.aliexpress.com/e/dTXoboy Sensor Shield -> http://s.click.aliexpress.com/e/bWIrdX5Q