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Bluetooth Low Energy Wireless Thermometer

remote temperature display on your smartphone

Bluetooth Low Energy Wireless Thermometer
This outdoor thermometer in a waterproof case uses Bluetooth Low Energy 4.0 (BLE) to communicate with a modern touch-screen phone: iPhone 4S (or later), Android 4.3 (or later), by means of a self-contained BL600-SA module designed by Laird. There are no (other) active components, everything is in the mini-module which is programmed in… BASIC!
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Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
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Component List
R1 = 10kOhm 0.1%*
R2 = 12kOhm*
R3 = 150Ohm
R4 = 1kOhm
R5,R6 = 10kOhm
10 kOhm thermistor CTN B57891S103F8 (2112816)
C1,C2,C3 = 100nF, 0.2” pitch
LED1 = LED, 3mm
MOD1 = BL600 module (Laird Technologies)
JP1 = 3-pin pinheader
JP2 = 2-way socket e.g. Molex (9731148)
2 jumpers
K1 = 6-pin pinheader
S1 = miniature pushbutton (1555985)
CR123A* battery holder (1650670)
16 PCB pin sockets
Enclosure, Multicomp type G302 (1094697)
PCB # 140190-1
Ready assembled Bluetooth 4.0 thermometer, Elektor Store # 140190-91
* see text
Numbers in round brackets are Farnell / Newark order codes

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