Wireless Climate Sensor


This is my wireless climate sensor. The sensor can support  DHT22 or DS18B20+. The source code can be found here.  It consumes around 10 μA while in standby. It sends an update over ESPNow to the hub every 15 minutes. It can also be used in a stand-alone mode, without the hub, to connect directly to Wi-Fi. The sensor was designed using an ESP8266 Wi-Fi module, an ATtiny microcontroller, LDO and  DHT22/DS18B20+ ( recommended). It has a built-in Lithium-Ion/Lithum-Polymer charger and a micro-USB  plug for charging. Please note: the ATtiny13a needs to be pre-flashed before it is soldered in.

SKU: MDY00738 Categories: ,



climate sensor assembly

Components (BOM)

Temperature Sensor DHT22 or DS18B20+
ATtiny ATTINY13A-SSU (pre-flash before solder) MICROCHIP
USB micro plug
3.3v LDO SPX3819M5-L-3-3/TR EXAR
ESP-12F ESP-12F(ESP8266MOD) Ai-Thinker
Diode 1N4007
Resistors 2 x 5.1k 1%,  2 x 10k, 1M 1%, 3.3M 1%, 1k 0603 or 0805 (tight fit)
Capacitors 2 x 4.7u, 10u, 100n, 10n 0603 or 0805 (tight fit)
LEDs red 0603 or 0805 (tight fit)



Weight 5 g
Dimensions 4.75 × 2.35 × 0.1 cm
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