DT24 bluetooth Voltmeter

[NorthernMan54]

Support for DT24 Bluetooth digital display DC Power APP Voltmeter
Ammeter Battery Capacity Tester Fuel Gauge voltage detector Meter

https://www.aliexpress.com/item/4000835324129.html?spm=a2g0o.productlist
.0.0.5aa96393c4qWIg&algo_pvid=dd8f4348-fad0-43e3-b3c0-e711180ed13e&algo_
expid=dd8f4348-fad0-43e3-b3c0-e711180ed13e-0&btsid=0bb062441622503466970
1271e3fb6&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

For reference, these were the compiler definitions I used

; *** ble flags ***
  '-DZgatewayBT="BT"'
;  '-DLED_RECEIVE=2'
;  '-DLED_RECEIVE_ON=0'
  '-DTimeBtwRead=0'
  '-DScan_duration=20000'
  '-DAttemptBLECOnnect=true'
  '-DPublishOnlySensors=true'
;  '-DLOG_LEVEL=LOG_LEVEL_TRACE'

[1technophile]

Thanks, one last thing can you add also the model here please
https://github.com/1technophile/OpenMQTTGateway/blob/development/docs/prerequisites/devices.md#for-ble-devices

[1technophile]

Could you add also the auto-discovery functions for this sensor please, here is an example:
#972

[1technophile]

@NorthernMan54 we are planning to do some modifications on the BLE parts, do you think we could go further with this PR or should I integrate it like this?

[NorthernMan54]

I have the home assistant discovery bits mostly complete and am just wrapping up my testing. I had been running things without discovery enabled, as my testing devices kept appearing in my production environment. And once I enabled discovery and the gatewaybt module caused my home automation to crash.

I’m not running home assistant but homebridge with a plugin ( homebridge-tasmota) that leverages home assistant mqtt discovery messages to automatically integrate tasmota and other devices into Homebridge. And once I enabled openmqttgateway discovery with Bluetooth devices everything crashed on homebridge. And I’m adding some defensive code ( my homebridge code didn’t like the topic wild cards in the discovery message) to stabilize my setup and ensure device discovery is working.

I’m about 90% complete

[NorthernMan54]

This is my WIP which is 90% complete, and likely just needs some minor tweaks before publishing. I would recommend merging, and I will rebase myself for any further tweaks required.

[h2zero]

I would recommend merging, and I will rebase myself for any further tweaks required.

Agreed, the upcoming BLE changes will change a lot of this. If this is working as is, then merging now and updating it against the new base would make the most sense.

[1technophile]

Thanks