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https://github.com/nufeen/eucdata
Wear os app for monitoring EUC sensors data
https://github.com/nufeen/eucdata
Last synced: 29 days ago
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Wear os app for monitoring EUC sensors data
- Host: GitHub
- URL: https://github.com/nufeen/eucdata
- Owner: Nufeen
- Created: 2020-01-05T14:25:17.000Z (about 5 years ago)
- Default Branch: master
- Last Pushed: 2020-01-08T14:37:41.000Z (about 5 years ago)
- Last Synced: 2024-11-06T22:26:51.241Z (3 months ago)
- Language: Kotlin
- Size: 130 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: readme.md
Awesome Lists containing this project
README
# EUC Data
Wear OS app showing data from EUC.
Current status: WIP, supports Gotway only.
## Decoding
### WheelLog
Some of decoding EUC responses code taken from here:
https://github.com/palachzzz/WheelLogAndroid/blob/master/app/src/main/java/com/cooper/wheellog/WheelData.java
### Gotway response structure
https://forum.electricunicycle.org/topic/2850-converting-the-msuper-board-to-bt-le/
https://forum.electricunicycle.org/topic/870-gotwaykingsong-protocol-reverse-engineering/
```
// Packet String Type = 00
// i.e.
// 55 aa 17 1c 00 00 00 00 00 00 00 e0 f2 78 00 01 ff f8 00 18 5a 5a 5a 5a
//
// 55 aa = Header
// 17 1c = Voltage
// 00 00 = Speed (signed short)
// 00 00 00 00 = Trip Odo
// 00 e0 = Current
// f2 78 = Temperature
// 00 01 ff f8 = UNKNOWN
// 00 = Packet String Type
// 18 = Byte Count excluding the "55 aa"
// 5a 5a 5a 5a = Footer
//
// Packet String Type = 04
// i.e.
// 55 aa 00 00 ec f2 00 00 00 00 00 00 00 00 00 00 00 00 04 18 5a 5a 5a 5a
//
// 55 aa = Header
// 00 00 ec f2 = Odometer
// 00 00 00 00 00 00 00 00 00 00 00 00
// 04 = Packet String Type
// 5a 5a 5a 5a = Footer
```
## BLE Notes
### Bluetooth low energy overview
https://developer.android.com/guide/topics/connectivity/bluetooth-le
### Note
https://stackoverflow.com/a/23660414
Here is the general pattern for how things need to work with BLE on Android:
- You try to connect
- You get a callback indicating it is connected
- You discover services
- You are told services are discovered
- You get the characteristics
- For each characteristic you get the descriptors
- For the descriptor you set it to enable notification/indication with BluetoothGattDescriptor.setValue()
- You write the descriptor with BluetoothGatt.writeDescriptor()
- You enable notifications for the characteristic locally with BluetoothGatt.setCharacteristicNotification(). Without this you won't get called back.
- You get notification that the descriptor was written
- Now you can write data to the characteristic. All of the characteristic and descriptor configuration has do be done before anything is written to any characteristic.
## GOTWAY SERVICES:
00001800-0000-1000-8000-00805f9b34fb
00001801-0000-1000-8000-00805f9b34fb
0000180a-0000-1000-8000-00805f9b34fb
0000ffe0-0000-1000-8000-00805f9b34fb
### 00001800
Characteristic uuids:
00002a00-0000-1000-8000-00805f9b34fb
00002a01-0000-1000-8000-00805f9b34fb
00002a02-0000-1000-8000-00805f9b34fb
00002a03-0000-1000-8000-00805f9b34fb
00002a04-0000-1000-8000-00805f9b34fb
## 00001801
Characteristic: 00002a05-0000-1000-8000-00805f9b34fb
Descriptor: 00002902-0000-1000-8000-00805f9b34fb
### 0000ffe0
Characteristic: 0000ffe1-0000-1000-8000-00805f9b34fb
Descriptor: 00002901-0000-1000-8000-00805f9b34fb
Descriptor: 00002902-0000-1000-8000-00805f9b34fb
## WEAR OS NOTES
Really USEFUL one:
https://medium.com/mindorks/a-beginner-guide-to-android-watch-app-wear-2-0-71b27a802d11