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Fixed TPMS type 5 sensor readings

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Fixed issue with temperature & pressure values for OOK-8400-Schrader TPMS sensor type 5 (temperature & pressure were swapped and using wrong conversion ratio).  Tested fix against 14 sensors of this type.
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Mark Thompson 2023-04-03 15:36:10 -05:00 committed by GitHub
parent 3db3e78b44
commit be691fd278
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 4 deletions
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8
firmware/common/tpms_packet.cpp
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@ -100,8 +100,8 @@ Optional<Reading> Packet::reading_ook_8k4_schrader() const {
* Preamble: 01*40 * Preamble: 01*40
* System ID: 01100101, ??*20 (not really sure what this data is) * System ID: 01100101, ??*20 (not really sure what this data is)
* ID: 32 Manchester symbols * ID: 32 Manchester symbols
* Value: 8 Manchester symbols (temperature?) * Value: 8 Manchester symbols (pressure)
* Value: 8 Manchester symbols (pressure?) * Value: 8 Manchester symbols (temperature)
* Checksum: 8 Manchester symbols (uint8_t sum of bytes starting with system ID) * Checksum: 8 Manchester symbols (uint8_t sum of bytes starting with system ID)
*/ */
/* NOTE: First four bits of packet are consumed in preamble detection. /* NOTE: First four bits of packet are consumed in preamble detection.
@ -123,8 +123,8 @@ Optional<Reading> Packet::reading_ook_8k4_schrader() const {
return Reading { return Reading {
Reading::Type::GMC_96, Reading::Type::GMC_96,
(uint32_t)id, (uint32_t)id,
Pressure { static_cast<int>(value_1) * 4 / 3 }, Pressure { static_cast<int>(value_0) * 8 / 3 },
Temperature { static_cast<int>(value_0) - 56 } Temperature { static_cast<int>(value_1) - 61 }
}; };
} else { } else {
return { }; return { };