I have a Yamaha CR20a soundbar. You can control it via an app using bluetooth. Somebody much cleverer than I has made a python script/web server to control theirs.
I’m using the latest BLE components of ESPHOME in an attempt to read the status of, and ultimately control, this soundbar.
I’ve got the soundbar’s mac address, and used some sample script from the ESPhome website to read out the service uuids and characteristic uuids to try and get some kind of information display as a sensor value:
esp32_ble_tracker:
on_ble_advertise:
- mac_address: 00:19:01:C3:26:DC
then:
- lambda: |-
ESP_LOGD("ble_adv", "YAMAHA BLE device");
ESP_LOGD("ble_adv", " address: %s", x.address_str().c_str());
ESP_LOGD("ble_adv", " name: %s", x.get_name().c_str());
ESP_LOGD("ble_adv", " Advertised service UUIDs:");
for (auto uuid : x.get_service_uuids()) {
ESP_LOGD("ble_adv", " - %s", uuid.to_string().c_str());
}
ESP_LOGD("ble_adv", " Advertised service data:");
for (auto data : x.get_service_datas()) {
ESP_LOGD("ble_adv", " - %s: (length %i)", data.uuid.to_string().c_str(), data.data.size());
}
ESP_LOGD("ble_adv", " Advertised manufacturer data:");
for (auto data : x.get_manufacturer_datas()) {
ESP_LOGD("ble_adv", " - %s: (length %i)", data.uuid.to_string().c_str(), data.data.size());
}
ble_client:
- mac_address: 00:19:01:C3:26:DC
id: yamahacr20
And when I compile and run…it connects. I can see lights on my soundbar flashing (as the esp makes some sort of connection) and it spits out various bits of information:
|19:53:14|[I]|[esp32_ble_client:142]|Service UUID: 0x1801|
| --- | --- | --- | --- |
|19:53:14|[I]|[esp32_ble_client:143]|start_handle: 0x1 end_handle: 0x4|
|19:53:14|[I]|[esp32_ble_client.service:057]|characteristic 0x2A05, handle 0x3, properties 0x20|
And from that I’ve tried to make a ble characteristic sensor:
- platform: ble_client
type: characteristic
ble_client_id: yamahacr20
name: "Yamaha Value"
service_uuid: '1801'
characteristic_uuid: '2A05'
But…it just shows NaN. So I feel like i’m missing something fundamental. Also the ESP seems to connect and drop connection to the soundbar frequently - is that normal for ble? Any help would be appreciated!
