Tuya BLE sensor: BTH01

[user784213]

Hello
I have a very similar sensor: BTH01
Marking on SoC: PHY6222QCW04IYOJSH (PHY6222QC-W04C)
Marking on sensor: 8305 (CHT8305C)
The case looks cheap, same as TS0202, disassembles very easily
Current price on Aliexpress is less than $2

[pvvx]

Разработка PHY6222 только началась.
Пока не будет ОТА, не будет и новых прошивок и не будут выложены исходные коды.

Development of PHY6222 has just begun.
Until there is an OTA, there will be no new firmware and the source codes will not be posted.

[pvvx]

CHT8305
https://github.com/pvvx/ZigbeeTLc/blob/master/src/sensor_cht8305.c

[pvvx]

Соединения на печатной плате BTH01

N ножки чипа	Куда соединен	Маркировка	Название вывода чипа
1	Через R2 на С11 + Сенсор Vdd	CHT8305_VDD	GPIO_P00
32	Сенсор SCL + R4 на Сенсор Vdd	CHT8305_SCL	GPIO_P34
31	Сенсор SDA + R5 на Сенсор Vdd	CHT8305_SDA	GPIO_P33
7		TM	TM
8		TX1	GPIO_P09
9		RX1	GPIO_P10
11	Кнопка S1 (работает на GND) + C2  + R8 на Vbat		GPIO_P14
20		RX2	GPIO_P18
21		TX2	GPIO_P20
22	C10 на GND	REST_N	RST_N
15	Через R7 на светодиод D1		GPIO_P15
27		P25	GPIO_P25

[pvvx]

Тестовая прошивка для BTH01 готова, протестирована.

[theanch92]

Hi, first of all thank you for the hard work done! I just flashed your latest firmware BTH01_v05.hex on a BTH01, Bluetooth communication works but the temperature and humidity values were 0, the battery value is fine.
Looking on pcb, my BTH01 appears to have the AHT30 sensor and not the CHT8305C.

I have hope that you can also implement this sensor? Thanks so much again!

[pvvx]

I don't have AHT30 yet. But I added processing code. There is no opportunity to check yet...
OTA version coming soon - It will be possible to change the firmware regardless of the sensors.

[theanch92]

I don't have AHT30 yet. But I added processing code. There is no opportunity to check yet... OTA version coming soon - It will be possible to change the firmware regardless of the sensors.

Flashed FW 0.7 and the AHT30 works perfectly!
Also installed on TH05 and here too everything is perfect!

Great job

[NeoMatrixJR]

I don't have AHT30 yet. But I added processing code. There is no opportunity to check yet... OTA version coming soon - It will be possible to change the firmware regardless of the sensors.

Flashed FW 0.7 and the AHT30 works perfectly! Also installed on TH05 and here too everything is perfect!

Great job

Did you flash OTA with the example site or did you solder in? Is this fully functioning firmware to add to home assistant via proxy and still has functional screen or is this just testing getting custom firmware on the device? I tried the example web page but it wouldn't list my test device.

[sstidl]

@pvvx Hi Victor! I have v0.6 flashed via serial. can i update to 0.7 OTA? or do I have to do this over serial a last time?

[pvvx]

v0.x is the firmware for tests.
While the firmware number is not 1.x or higher, these are test firmwares and many things do not work in them.
Normal OTA will be from version 1.0.
If the firmware works, then there is no need to change it until v1.0 is released.

[g6094199]

he guys.

sorry but i dont gt how to get the chip to flash mode?
must TM pulled to high (3.3V)? or have i to pull RST (which PIN is this?) to GND?
or what else is wrong?

[sstidl]

he guys.

sorry but i dont gt how to get the chip to flash mode? must TM pulled to high (3.3V)? or have i to pull RST (which PIN is this?) to GND? or what else is wrong?

In my case it worked with TM left open and RST shortly pulled to GND
At the same time try to connect with the python script

[pvvx]

USB-UART	PCB
RX	TX1
TX	RX1
RTS	REST_N
GND	-Vbat
+3.3V	+Vbat

[g6094199]

USB-UART PCB
RX TX1
TX RX1
RTS REST_N
GND -Vbat
+3.3V +Vbat

with RTS to REST_N i get

PHY62x2 - Reset Ok
Error read Revision!

but with " RST shortly pulled to GND" it works.

[pvvx]

but with " RST shortly pulled to GND" it works.

Linux ? - Everything is crooked there.

[g6094199]

but with " RST shortly pulled to GND" it works.

Linux ? - Everything is crooked there.

yes, never used windoze in 20 years. so linux is my natural OS.

[TheNitek]

PHY62x2 - Reset Ok
Error read Revision!

I have the same error with windows, trying to reset manually (I use a arduino uno with board with the atmel removed as a serial adapter and reset line is not availble, I think.)

[g6094199]

its tricky...even with another instance inbetween. i started the flash and grounded the pin afterwards shortly. you maybe have to play with the timing

[TheNitek]

Since i get the "Reset ok" message, I guess my timing is ok, but it's still unable to read the revision

[g6094199]

also did get the "reset ok" as you can read in my post, but it was not "ok".

[tERB00]

I did this:

• Connected all the pins including REST_N to Gnd
• Started the script
• Pulled off REST_N lead from Gnd

Flashed that way first try with no issues.

[TheNitek]

That's what I am trying, but It doesn't work even after many, many attempts. I feel like my board might be different in some way ...

[pvvx]

REST_N must be released when the Reset OK message occurs.
Without an RTS signal from the adapter to REST_N, the connection is difficult.

[TheNitek]

New serial adapter is already on it's way 😀 I hope it works then

[pvvx]

but with " RST shortly pulled to GND" it works.

Linux ? - Everything is crooked there.

yes, never used windoze in 20 years. so linux is my natural OS.

On Linux there are always problems with setting the character reception timeout and RTS/DTR on USB-UART adapters.

[tERB00]

That's what I am trying, but It doesn't work even after many, many attempts. I feel like my board might be different in some way ...

I've got exact the same board. And yes, some usb adapters doesn't work with some devices but work with others... I used CH341A programmer in TTL mode on mine.

[TheNitek]

Different USB2Serial worked the first time, even though I did the reset manually.

[electro-nic]

Hi! yesterday I flashed the sensor and I would like to set the advertising period to 1 min as on xiaomi but max value 10000

[electro-nic]

Firmware 1.6
8:52:06: Поиск устройств
08:52:28: Ожидание соединения с BTH01-DB601F
08:52:38: Model: BTH01
08:52:38: Firmware: github.com/pvvx
08:52:38: Hardware: 0014
08:52:38: Software: V1.4
08:52:38: Device info # hw: 0014, sw: 0014, services: 00004398, sd: 0000
08:52:38: Устройство подключено.
08:53:10: Установка времени на устройстве (23763AE465)...

[draekko]

Just an FYI for future readers of this issue thread, in my case with my serial adapter i had to tap REST_N to ground to get it working instead of just going straight to ground and then releasing like was suggested. Was using an older cp210x adapter.

[pvvx]

The script has been fixed to work on Linux.

[draekko]

good to know

[gvieiraaa]

Sorry if I got this wrong, but I can't use OTA first, I have to flash using UART?

And could I do it with a raspberry pi instead of with a uart usb adapter?

[pvvx]

On rPi you need to switch something to output RTS... /boot/config.txt ...

[NonPIayerCharacter]

Have one of those, initially it was with CHT8305, but with original firmware I didn't find a use for it. Later removed 8305, as i needed it as a spare part for something else. Found this firmware, looked through source, and seen that it supports AHT2x. Instead of 8305, soldered AHT21, as they are almost pin compatible (AHT21 lacks AD0 and ALERT pins, instead they are NC), and can confirm that this mod works.

[Nikolay-Ch]

@pvvx - is it not expected to support other data packet formats (for example ATC1441), like for devices on the Telink chipset?

[pvvx]

BTHome is the only open standard with a registered UUID and paid for in the Bluetooth SIG by Allterco.
https://bthome.io/images/License_Statement_-_BTHOME.pdf
Register and pay for the UUID for ATC1441, then I’ll turn it on.