BT785: Difference between revisions
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== Introduction == | == Introduction == | ||
This page is about reverse engineering the BT-785, an inexpensive Tuya-compatible water electrical conductivity (EC) meter. | This page is about reverse engineering the BT-785, an inexpensive Tuya-compatible water electrical conductivity (EC) meter. | ||
It measures EC and temperature, and has a display and communicates its reading over Bluetooth Low-Energy (BLE) to the Tuya app on a phone. | It measures EC and temperature, and has a display and communicates its reading over Bluetooth Low-Energy (BLE) to the Tuya app on a phone. | ||
The goal is to understand the communication protocol so we can communicate with it from the raspberry pi in the [[Karaburan]] project. | |||
== Analysis == | |||
[[file:bt785-nrfconnect.png]] | |||
On the lowest level, it uses bluetooth low-level with the GATT profile: | |||
Revision as of 08:27, 12 October 2025
Introduction
This page is about reverse engineering the BT-785, an inexpensive Tuya-compatible water electrical conductivity (EC) meter. It measures EC and temperature, and has a display and communicates its reading over Bluetooth Low-Energy (BLE) to the Tuya app on a phone. The goal is to understand the communication protocol so we can communicate with it from the raspberry pi in the Karaburan project.
Analysis
On the lowest level, it uses bluetooth low-level with the GATT profile: