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1 | ------------------------------------------------------------------------------- |
2 | BTHR968: OOK data | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is an example capture of a virtual Oregon Scientific BTHR968 temperature, | |
6 | humidity and pressure sensor which transmits at 433.92 MHz using Manchester | |
7 | encoding and amplitude modulation. | |
8 | ||
9 | The signal was received by an RF Solutions RX12 superhet decoder chip and then | |
10 | passed to the logic analyser. | |
11 | ||
12 | In order to decode the Oregon v2.1 BTHR968 you will need to change the | |
13 | preamble to '1010 ...' in the ook decoder. Currently you can ook decode either | |
14 | a preamble of '1111 ...' or '1010 ...' but not both at the same time, so you | |
15 | can see Oregon v2.1 or v3 sensors. | |
16 | ||
17 | Details: | |
18 | https://gist.github.com/RouquinBlanc/5cb6ff88cd02e68d48ea BTHR918N_ArduinoSender.ino | |
19 | https://www.rfsolutions.co.uk/downloads/1481732062DS-AM-RX12.pdf | |
20 | ||
21 | ||
22 | Logic analyzer setup | |
23 | -------------------- | |
24 | ||
25 | The logic analyzer used was a USBee AX Pro / Saleae Logic clone (at 25kHz): | |
26 | ||
27 | Probe RX12 | |
28 | ---------------- | |
29 | 0 OUT | |
30 | 1 Output from Arduino running virtual BTHR968 | |
31 | ||
32 | ||
33 | Data | |
34 | ---- | |
35 | ||
36 | * oregon_bthr968.sr: | |
37 | Contains a single set of pulses that belong to a virtual Oregon Scientific | |
38 | BTHR968 temperature, humidity and pressure sensor. These should decode as | |
39 | channel 2, battery OK, rollingcode BC, temp 11.2 deg C, humidity 52%, | |
40 | pressure 1013mb, checksum OK. |