LYWSD03MMC no longer sends info after using 3.5c

[comet424]

so i noticed there is a new version of the atc thermometer.bin the 3.5c as i figured it fix the issue that LYWSD03MMC should be only sending info every 10 min to save battery life

but really its updating more often when i using it with ESP Home and a wroom32 to monitor it in Home Assistant.. i tried multiple times to save 10 min option but it still updates more often sometimes every few seconds to a few min

so i was usint the atc_thermometer.bin
i tried the 3.5c and it uploads but it now no longer sends info in esphome it just shows the mac address it broadcasts.. but it will no longer send data.. when i downgrade back to atc_ther...bin it will transmit data..

and dont know which HW version i have it doesnt say on the unit..

but still cant solve the issue it wont only send info every 10 min

and actually you cant change the settings or Save configuration..

it says it sends the commands successfully to the device and save... but it actually doesnt you cant turn off face or see the STO icon.. least you can downgrade back to the atc_thermometer.bin which ever version that is

[PCjabber]

Try disconnecting from the flasher web page, then remove & replace the battery in the thermometer. The Bluetooth icon should not be lit on the display.

If you need to reconnect with the flasher page, you may need to refresh the browser before it will reconnect.

[comet424]

nope doesnt work.. when i disconnect the phone and then add the MAC address to ESPhome in Home Assistant it will detect the Bluetooth Mac Address in ESP Home.. but it will not broadcast the Temperature Humidity. battery life..

i have tried pulling battery etc..

on the Flasher Webpage you can send commands successfully to the device (thats what it says) but actually you cant .. it will not remove the face or battery.. when you send the Save configuration to Flash it will not write STO like in the atc_thermometer.bin file..

with the atc_thermometer.bin file it all works you can remove the smile battery... the send data every 10 min doesnt work it seems to send it randomly between every few seconds to 5 min or so... even if you press the 10 min several times and hit save configuration to flash...

ive tried uploading atc_35c a 2nd time after doing it once and it weill actually upload at 10x slower so instead of 68 seconds to upload the firmware or so it will actually take 5-10m to get like 10 percent then crap out saying it failed...

but i can always downgrade back to atc_thermometer.bin

i have tried it with 4 of 11 of my lywsd03mmcs they all fail not being able to send data to home assistant the logger of ESPHome shows nothing

also the TEFlasher cant read the temperature display... i dont have it hooked up and flashed.. but it gave some error that you wont be able to view the display as your running custom or something.. just says for the temp/humidity section it writes you wont be able to view it...

but once i downgrade i can get it to work with home assistant.. but it just wont do every 10 min to save battery life.. it randomly choooses to send updated info through the blue tooth so i wont even last 6 months on it... i bet started off at 100% like jan 13 and some down to 75% or so one is down to 43%

ill try to add photos when i get a chance to re upgrade etc ill try today

[comet424]

so running with the atc_thermometer.bin this is working with esphome home assistant.. i going to mod the bedroom sensor one

[comet424]

here is where i modded it and stops working for bedroom

[comet424]

so it will only display the found device .... 55:5A it will never display the info now when i downgrade back to atc_thermometer.bin when i downgrade.. i do not even have to re save the config it remembers not to keep the smily face or battery on. and keeps it off.. and it resends data to home assistant

[pvvx]

"only send info every 10 min" - there is no such version. The maximum advertise transmission interval in the BLE standard is up to 10 seconds to be able to connect to the device. Periodic advertise is only included in the new Bluetooth 5.3 standard. With periodic advertising, it is not possible to connect to the device. The LYWSD03MMC does not have a button to switch to connectivity mode like the XMWSDJ04MMC does.

The ATC1441 version has an advertising interval of 1.875 seconds and is not configurable. My version has the ability to set the ad interval from 60ms to 10s. But it is not recommended to set the interval to more than 3 seconds. On a lot of equipment, you will not be able to connect to a device with interval settings longer than 3 seconds.

[pvvx]

The measurement interval is configurable. Its value is set in advertising interval periods and ranges from 1 to 25. If the advertising interval is 2.5 seconds and the measurement interval is 4, then the polling sensors will be 2.5 x 4 = 10 seconds. If the measurement interval is 25 and the advertising interval is 10 seconds, then 250 seconds will elapsed between measurements. Battery measurement requires ultra-low consumption and does not affect battery life. The battery life is mainly affected by the transmission of advertising packages, active scanning by third-party devices, frequent connections to the device. As a result, this significantly exceeds the required energy for measurements.

[comet424]

but i guess i miss read it. its 10 min internal.. i thought that ment it only updates the screen every 10 min and then sends out a ble signal . but i guess ble is always connected.. so its not like a wifi signal that it only sends when there is a change

and not sure what you mean not able to connect to the device with internal settings longer then 3 seconds?

is this mean that for the atc_35c.bin?

is that why it doesnt work with esphome and the teflasher? you cant turn off the smile face or change from C to F all the features are disabled..

so how would i say make esphome/home assistant to like 10 min like the internal advertisement that would save battery life..

[comet424]

this is my epshome a section for it for the esp32 is there something i can add to make the interval longer? i did try update_interval: 5m or 5000s but it doesnt like that command

esphome:
  name: bluetooth-server-1

esp32:
  board: esp-wrover-kit
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:
  password: !secret api_password

ota:
  password: !secret ota_password

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Bluetooth-Server-1"
    password: "2fUNYh70fTZZ"

captive_portal:

esp32_ble_tracker:

sensor:
#######################################
### Bedroom Temperature Thermometer ###
### Mijia Bluetooth Thermometer 2   ###
#######################################

  - platform: atc_mithermometer
    mac_address: "A4:C1:38:3B:55:5A"    
    temperature:
      name: "Bedroom Temperature (Xiaomi)"
    humidity:
      name: "Bedroom Humidity (Xiaomi)"
    battery_level:
      name: "Bedroom Battery-Level (Xiaomi)"
    battery_voltage:
      name: "Bedroom Battery-Voltage (Xiaomi)"

[pvvx]

In Home Assistant, data update intervals are configurable. Please refer to its documentation. ESP Home does not support all thermometer variants and various BLE devices and is not considered here.

[comet424]

ya i looked esphome kinda has update thing ill have to look in it

and esphome home does work with it. just not with latest version

ATC_35c.bin doesnt work with LYWSD03MMC with teflasher and Esphome and Home assistant ATCthermometer.bin works LYWSD03MMC with teflasher and esphome and home assistant

i upgraded to atc_35c.bin as it had latest update for LYWSD03MMC and any added features
but as you see in the pics above it breaks the unit

but i wanted to download the atc_theremometer.bin as its not on the github just the atc_35c i was going to save it to my home assistant folder...
i only have it on my phone.. but its not letting me download the file off the phone to the computer for some reason

[pvvx]

you cant turn off the smile face or change from C to F all the features are disabled..

Yes :

[comet424]

well then why doesnt it work for me above??

atc_thermometer.bin you see the pics you can turn off smile face you can change to C turn off Battery

atc_35c.bin you see in the pics above.. you cant turn off Smile face you cant turn off battery you cant switch to F
you cant save configuration to Flash it says send configuration but there is no "STO" on the thermostat screen

and there is no ACC i think it was when you program the thermostat atc_theremostat.bin it does ACC and what not it looks like it reboots the thermostat..

where as ath atc_35c does nothing as you can see from the pics

wehre i showed

atc_theremostat.bin then to atc_35c.bin then back to atc_thermostat.bin

to show its not working

maybe ill make a youtube video so you can see its not working for me.

and these are all 2021 October Thermostats

[comet424]

so i made video my internet is slow so going t take a bit to upload
i show where once i install the atc_35c the unit doesnt update.. and youll see as its uploading the File not even 50 percent i guessing the thermostat factory resets itself? not sure but ill post when its done

[pvvx]

For this version ATC_Vx.x.bin, TelinkMiFlasher works from this repository: https://pvvx.github.io/ATC_MiThermometer/TelinkMiFlasher.html For atc1441 version (ATC_Thermometer.bin) from this https://atc1441.github.io/TelinkFlasher.html

[comet424]

oh ok.. ill try.. didnt know i needed a different installer.. ill give it a try and whats better then atc_thermometer or atc_35c

as i did the atc_thermometer.bin from the youtube videos but when i lost the link i googled.. and found that atc_35c and then i used the same webpage installer i found..

but ill give it a try thanks

[comet424]

so i trying is it normal to be slow like i mentioned i found 1% takes 16 seconds so 10% took 92 seconds

took a bit to figure it out

[comet424]

so i got it to upload this atc_35c
the features on the page.. are they all for this device? or multiples..

showing time on this doesnt work so well.. but least its working i think..

what settings is best for this then to use the least amount of battery the predefinned settings i just enter in and away i go

and i miss read things i though there was 1 person wrote the program and had 2 different versions

instead there is 2 different programs 2 different programmers so my bad

[comet424]

so guess i need to use the atc_thermometer.bin file
even with the other website to use the atc_35c.bin

the atc_35c is incompatible with esphome... and atc_thermometer.bin is compatible with esphome so that sucks as i liked what i read that the 35c saves more battery power but it just cant see the internals

[12:50:47][D][esp32_ble_tracker:720]: Found device A4:C1:38:3B:55:5A RSSI=-86
[12:50:47][D][esp32_ble_tracker:741]:   Address Type: PUBLIC
[12:50:47][D][esp32_ble_tracker:743]:   Name: 'ATC_3B555A'
[12:51:06][D][atc_mithermometer:112]: Got ATC MiThermometer (A4:C1:38:98:BA:1D):
[12:51:06][D][atc_mithermometer:115]:   Temperature: -6.2 °C
[12:51:06][D][atc_mithermometer:118]:   Humidity: 44 %
[12:51:07][D][atc_mithermometer:121]:   Battery Level: 54 %
[12:51:07][D][atc_mithermometer:124]:   Battery Voltage: 2.708 V

stage one uses atc_thermometer.. and the 55 5a uses the atc_35c

and i forget from up above i the atc_35c can send the internal info or not

sorry if i dont make sense or run sentences etc i have dislexia learning disability... it sounds ok to me when i read and write it.. but it may not always sound right to someone else

[PCjabber]

the atc_35c is incompatible with esphome... and atc_thermometer.bin is compatible with esphome so that sucks as i liked what i read that the 35c saves more battery power but it just cant see the internals

[12:50:47][D][esp32_ble_tracker:720]: Found device A4:C1:38:3B:55:5A RSSI=-86
[12:50:47][D][esp32_ble_tracker:741]:   Address Type: PUBLIC
[12:50:47][D][esp32_ble_tracker:743]:   Name: 'ATC_3B555A'
[12:51:06][D][atc_mithermometer:112]: Got ATC MiThermometer (A4:C1:38:98:BA:1D):
[12:51:06][D][atc_mithermometer:115]:   Temperature: -6.2 °C
[12:51:06][D][atc_mithermometer:118]:   Humidity: 44 %
[12:51:07][D][atc_mithermometer:121]:   Battery Level: 54 %
[12:51:07][D][atc_mithermometer:124]:   Battery Voltage: 2.708 V

if you want to use the ATC_V35c.bin firmware (from pvvx/ATC_MiThermometer repository, using this web page to flash), then change your ESPHome config from - platform: atc_mithermometer to - platform: pvvx_mithermometer ... the configuration you're currently using is for the ATC_Thermometer.bin (from atc1441/ATC_MiThermometer repository), which uses a different format in the Bluetooth data.

So, using your config from your post a few hours ago, your sensor section should look like this:

sensor:
#######################################
### Bedroom Temperature Thermometer ###
### Mijia Bluetooth Thermometer 2   ###
#######################################

  - platform: pvvx_mithermometer
    mac_address: "A4:C1:38:3B:55:5A"    
    temperature:
      name: "Bedroom Temperature (Xiaomi)"
    humidity:
      name: "Bedroom Humidity (Xiaomi)"
    battery_level:
      name: "Bedroom Battery-Level (Xiaomi)"
    battery_voltage:
      name: "Bedroom Battery-Voltage (Xiaomi)"

Update your ESPhome, and make sure you are not "connected" to the Xiaomi thermometer via the "flasher" web page (Bluetooth icon should not be visible on thermometer). Within a couple minutes, you should see similar lines in the log but with "pvvx" referenced instead of "atc", and HA should show all 4 sensor details.

[edit] As far as optimal settings to use, I can't really provide good advice yet. I just received my thermometers a few days ago. For what it's worth, I'm mostly using the default settings that come with ATC_V35c.bin (including advertisement 2500ms, measure interval 4x advert, RF TX power VANT+0.04dbm), except for these changes:

• degrees Fahrenheit
• save to flash every 90 measurement cycles (this works out to 15 mins, instead of default of 10 mins)

Hope this helps!

[comet424]

ya that helped i had to do it a couple times.. from the one screen as it wasnt populating the 2nd upload screen it got stuck where it says OTEFlasher or whatrever it is as i dont have the phone on me.. i ended up rebooting phone and the thermometer.. and i found it has a vB1.7

it was flashing between F and C also after 2 more flashes it stuck C

but its working.. but i havent touched any of the settings wanted to get it working to see alternate options then the other one...

with my dislixia i didnt even notice the pvvx_mithermometer and atc one i found the pvxx link off the esphome stupid dislexia you see words that arent there... so you have to re read things like 20 times sometimes

i hoping this version can save more battery power.. i started off at 100% with the stock batteries on jan 13 already they are down to 75 % area 1 is 56% and one is 43%

as you almost have to change the batteries ever month rate its going.. but then thats the stock batteries not sure if its other batteries..

but ya if you figure the best settings be good too.. cuz right now the one video i watched guy said battery lasts over a year https://www.youtube.com/watch?v=K-HG7qs9hK0

is the guy i learned these theremometers from... but he talks lasts a year i be lucky to last till super bowl lol

[pvvx]

so i trying is it normal to be slow like i mentioned i found 1% takes 16 seconds so 10% took 92 seconds

01:56:39: Searching for devices
01:56:56: Connecting to: ATC_0B5EED
01:57:18: Hardware Revision String: B1.4
01:57:18: Detected custom Firmware
01:57:18: Hardware Version: LYWSD03MMC B1.4, Software Version: 3.5, Sensor: SHTC3
01:57:18: Custom config: [5, 0, 0, 0, 40, 4, 169, 124, 49, 184, 60]
01:57:24: File size: 63716 bytes
01:57:24: Count: 3983
01:57:25: Start DFU
01:58:05: Update done after 38.914 seconds
01:58:15: Disconnected.

i hoping this version can save more battery power.. i started off at 100% with the stock batteries on jan 13 already they are down to 75 % area 1 is 56% and one is 43%

Not a single battery in the top ten LYWSD03MMC has yet been discharged when using custom firmware. The launch of several batteries was before the creation of custom firmware. All of them work with 10.2020 or 12.2020 on default settings. https://github.com/pvvx/ATC_MiThermometer/issues/165

[comet424]

guess that answers that mine took 5800 ish seconds

when i rebooted everything and re tried i took less...

[comet424]

ah ok ya i meant was about battery is.. ya they all work but what i ment was i hoping the custom firmware will make the LYWSD03MMC last say 365 days not say 60 days as thats what the battery lifes seem to be reporting in a way as it hasnt been a month in operation and they are in below 60% and the one is 39% and it started at 100%

so thats why i hoping the custom firmware and maybe a good battery.. ill get a year... at least not change them every couple months is what i ment about lasting

and not sure what 10.2020 12.2020 means is that the custom version?

[pvvx]

and not sure what 10.2020 12.2020 means is that the custom version?

The time since the first files in this repo is over 14-15 months. ATС1441 published the first version before September 1, 2020 (this is the date of his video). Since that time, I have been torturing several Xiaomi LYWSD03MMC with constant firmware and checks ... But the batteries in them are still native. Batteries were replaced only in all Xiaomi LYWSD03MMC with original firmware. 2 worked for 8 months, 2 others for 6..9 months, I don’t remember exactly.

[comet424]

ah ok thanks.. least i should get some life.. as i display the battery health in home assistant .. and it feels they wont last at at the one that was 43% today is 56% so not sure why the percentages change some back in 76% and 60% and 50% for 10 units i have and only put them on Jan 13... maybe bad batteries etc.. but hopefully they last 9 months...

least this custom code is working not sure how much better is from the orginal.. i have 5 and 5 5 running 35v and 5 running thermometer.bin so time will tell... least i got my head around things