This code is written for use with an ESP8266, an MS5611 (barometer), an DHTXX (humidity), a Dallas DS18B01 digital sensor (temp), a digital output PIR sensor (motion), and a 3v3 level beeper. It connects to Blynk server and periodically uploads temp, humidity, and barometer readings. It continuously observes PIR state, and beeps+sends a notification during PIR motion if armed with a Blynk App button. Browser firmware OTA upgrade is also initiated by a Blynk app button. This code is written to be as non-blocking as possible, however no modifications were done to the included libraries (which may contain some lines of blocking code).
Added bonus: It's also an internet connection monitor! Since this code resets when failing to connect to Blynk, it emits a short/periodic beep while internet is down.
| Vpin | Data Output (F.W. and Arm buttons are required... BLYNK_WRITE()'s use them) |
|---|---|
| V0 | Firmware Upload Button [0 = normal, 1 = upload] |
| V1 | Alarm Arm Button |
| V2 | Alarm Status LED |
| V3 | Alarm Trigger Count |
| V4 | Temperature 1 - Dallas [F] |
| V5 | Relative Humidity [%] |
| V6 | Barometer [Pa] |
| V7 | Heat Index [F] |
| V8 | Dew Point [F] |
| ESPpin | Description |
|---|---|
| io4 | Baro SCL pins |
| io5 | Baro SDA pins |
| io13 | PIR output pin |
| io12 | DHT sensor data pin |
| io14 | Dallas temp sensor (non-parasitic power) |
| io0 | 4k7 Low |
| io2 | 4k7 High |
| io15 | 4k7 Low |
| EN | 4k7 High |
| RST | 4k7 High |