Tasmota replacement for BL602, programming, pairing with Home Assistant, now with OTA working!

I was so excited that I managed to flash it that I just changed the wifi settings. I thought I'd do the rest later...

So maybe you've entered wrong WiFi settings? Do 5 quick power off/on cycles to enter safe mode (revert to access point).

the problem is that the relay doesn't turn off when pressed, it stays on

I don't understand... you don't need on-board relay to work in order to enter safe mode.

If you want to enter safe mode in OBK, you need to do 5 quick power off/on cycles of the whole device and NOT of the relay on your device. Unplug your whole device, plug it back, unplug, etc....

done. Then to enter safe mode I should see the wifi access open? But unfortunately I don't see it...

PS I tried to flash another sonoff and the same thing happened: I enter the parameters of my wifi (correct!) and BAT the sonoff becomes invisible

update: I managed, I don't know how, to make my sonoff 1CH Ewelink Wifi RF Switch Module Inching recognize my home wifi. I'll start from the beginning. After several attempts to flash the device, fearing that I had already lost it, I set bouffalo lav dev cube on bl602, enter the program and set the parameters:

partition table: ............./BouffaloLabDevCube-v1.9.0/chips/bl602/partition/partition_cfg_2M.toml
firmware: .........../OpenBL602_1.17.741.bin
boot2: ............./BouffaloLabDevCube-v1.9.0/chips/bl602/builtin_imgs/boot2_isp_bl602_v6.6.2/boot2_isp_release.bin

I connect the device with the adapter to the PC, click on refresh, set chip erase to true (delete the old firmware), click on open uart and then click on create&download.

I unplug everything, connect the sonoff directly with a USB cable, then from my smartphone (the PC did not connect) I enter the BL602 wifi (to connect you have to wait for the bl602 wifi to give the message internet not available!!!) and open the 192.168.169.1 page. I enter the menu and set the various parameters, except the wifi!!!!

on module configuration I set p14 on rel to control the relay remotely. (I was unable to set the physical button on the device)

I configure the MQTT parameters, configure Short Name and Full Name, go to Home and click on Restart.

After a couple of minutes I connect to the new wifi (it takes the name of the device), I take courage, re-enter the SSID and password of my WIFI, click on SUBMIT, cancel and recheck the data 5 times and then click on OK. With little confidence I enter the menu of my router to search for the sonoff among the devices connected to the WIFI and finally I see it on 192.168.0.101. Now I just have to figure out how to make it recognize the various GPIO for any sensors.

THANK YOU ALL!

Added after 2 [hours] 13 [minutes]:

unfortunately it was a flash in the pan. The device is unreachable again, the wifi is too unstable. I'm going back to the old ESP8266 modules

Out of interest is your AP/ router set to WPA2/WPA3? If yes, is the BL602 stable with it changed to WPA/WPA2 only?

This sounds like power supply issue. How do you power your BL602 module? Maybe you have a faulty capacitor?

Or maybe a bad solder joint?

I tried with a couple of chargers and USB cables. I didn't do any soldering, and the same thing happens on two twin devices. Now the router's wifi practically doesn't see them anymore...
the two sonoffs have a small antenna for RF reception. I think I'll try to eliminate it, maybe the wifi power will gain something....

I became aware of their delays on the wifi connection to the router (after 5 minutes they connect ...) and I took back in hand the 2 sonoff with bl602 module. The new little problem: I can not assign a fixed IP to the two devices because the router always sees them with the same client name and same MAC address. I tried to change long name, short name and the MAC from the menu but nothing, my router does not recognize the new values.
____________________
update for Sonoff 1CH Ewelink Wifi RF Switch Module Inching:
PIN14 / REL / 1
PIN21 / Btn / 1

PIN7 (RX) dinput
PIN16 (TX) dinput
PIN12 ( GPIO14? ) dinput

all solved! the problem was that I had not entered the fourth parameter in the dts entry.


Pratically the router was unable to assign the correct Mac Address to the device and the wifi went into confusion. Now it takes it immediately, even powered by a normal usb charger. Now I just have to configure the contact sensor.
Thanks again for the help!!

For me, the BL602 only works on WPA/WPA2, if I set WPA2/WPA3 on the router /Grandstream GWN7615 + GWN7624/, the BL602 does not connect at all (I use a hidden SSID). I tried to reflash boot (6.6.2), dts (40M), but only the Mac address changed, WPA2/WPA3 connection does not work.
I would need to solve the following:
- Has anyone working WPA2/WPA3 with hidden SSID on BL602?
- How to change the Mac address back - the change in OBK does not affect it.

XJ_ wrote:

Has anyone working WPA2/WPA3 with hidden SSID on BL602?

this seems to be a known issue with the SDK version used to build OBK I believe. WPA2/3 has not worked before.

XJ_ wrote:

How to change the Mac address back - the change in OBK does not affect it.

try this: https://www.elektroda.com/rtvforum/topic3930622-30.html#21263084

specifically, my addition to the post after 23 minutes

divadiow wrote:

try this: https://www.elektroda.com/rtvforum/topic3930622-30.html#21263084

specifically, my addition to the post after 23 minutes

@divadiow Thanks a lot.

I can confirm that uploading DTS using only the "M" value then the BL602 uses the MaC from "ap_mac_addr".



When "M", "B" or "MFB" is used, the MaC address of the device is used.



Unfortunately, in all settings I've tried, the MaC setting in OBK has no effect on this.

Added after 6 [minutes]:

divadiow wrote:

this seems to be a known issue with the SDK version used to build OBK I believe. WPA2/3 has not worked before.

That's not good news
So I'll have to use Beken again and the BL602 goes in the drawer behind the RTL8710 for now

Indeed. The SDK version being to blame is an assumption though, I don't know what would be involved to incorporate the latest code. A lot of work I guess. I do recall seeing a lot more mention of "wpa3" in the latest code vs OBK BL SDK.

Added after 1 [minutes]:

https://www.elektroda.com/rtvforum/topic4024917-30.html#21030549

Added after 3 [minutes]:

I might see if using the latest WiFi driver is possible without much effort. My coding skills are woeful though

divadiow wrote:

this seems to be a known issue with the SDK version used to build OBK I believe. WPA2/3 has not worked before.

That's not good news
So I'll have to use Beken again and the BL602 goes in the drawer behind the RTL8710 for now

>>19992780 .
I recently got my hands on a water/gas valve from Sonoff with this chip. I looked for a replacement for the ESP, but couldn't find one
Wireless automatic ball valve Works with eWeLink
https://a.aliexpress.com/_EvmtmM9
.

>>21290296 What does this device look like inside? Do you have any pictures? What module from BL602 is in there?

>>21291304 .
Unfortunately the valve died after 3 days, I sent it back for a claim. Unfortunately I have no more pictures

Interesting, I initially thought it was the CBU footprint, but it doesn't fit.

I accidentally bought a MagicHome module from BL602 on Ali. In my search for information on the device I purchased, I came across this very thread. I managed to reprogram the chip and something started working there. I even managed to connect to the HA using MQTT. However, I noticed that the reprogrammed chip works somehow strangely. After powering up, after a short time after startup, the chip stops responding to ping.Interestingly, however, the WEB interface works.
.

Is it only with me that it works like this? Or is there something wrong with my copy? Maybe I programmed something wrong.... Here is a screen shot of the settings:
.

Additionally, I noticed that the MQTT communication is also limping along....
The Drimmer was detected as a switch, and no sensor data refreshes.
.

Is my BL602 defective?

edit, after I published the post, I noticed that there was a soft update: Built on Nov 8 2024 20:04:01 version 1.17.767
After the update, no improvement.

>>21291349 I currently have one of these exact devices that I'm trying to convert to openbeken.
If you'd like any additional photos or info, let me know.
Can I assume the pinouts are all the same from a programming perspective?
Is there anything I should be most weary of when flashing?

Hey All,
I recently purchased this "Smart" Valve from Aliexpress

I opened it up to flash new firmware to de-cloud it. Found it was a BL602, my first time coming across one. This thread has been absolutely fantastic.

Ultimately I want to control using openhab, I will likely use MQTT to do so.

I have managed to flash the software, overcome the wi-fi, and mapped what I think are the correct pins. (See Below)



I however Can't seem to get the motor to turn (to close/open the valve).

From what I've been able to tell, the RZ7888 (motor driver) is connected via GPIO 14, and should close/open. According to this table I got from the datasheet.



I've tried using the pin finder to turn all of them from low to high, but it didn't seem to have any effect. Any assistance in trying to figure out what might be the best next course of action in trying to decipher this would be much appreciated. As I'm only a hobbyest.

regards,
Zack

Are you powering BL602 externally from the programmer? Motor control will only work if powered via device power supply.

Can you show some photos from inside? Have you tried checking pins with multimeter?

Added after 1 [minutes]:

Also, this motor control requires two pins, not just one. So it could by GPIO with some other pin.

>>21305127 .
There may be a replacement for this chip, I would like to upload Suple

Hi,
I recently bought two simple switches (like Sonoff Basic) with BL602. I managed to flash them and configure WiFi and MQTT to connect to HomeAssistant. But the problem is that I can't connect both to AP simultaneously. When I turn them on separately (either first or second) everything is ok, I can see IP assigned in the router and I can see it configured in Tasmota. But it's impossible to connect them both to AP. Every time one of them is not recognizable.
I tried to set up static IP, and change the MAC, and unfortunately, nothing helped.
Did anybody have a similar problem? Any idea how to solve it?

>>21341967

consider the discoveries in this post regarding mac addresses. perhaps reflash one with a modified dts file

https://www.elektroda.com/rtvforum/topic3930622-30.html#21263084

>>21342476 Thanks for your help. Unfortunately while soldering, the BT pad fell off from the PCB... I assume ther's no chance to upload DTS files via OTA?

Please show a detailed photo of the PCB, do you mean that the pad fell of directly from BL602 module, or from the mother board?

Can you solder a wire directly to QFN pad?

I could try...

From the motherboard. I don't have the appropriate soldering skills to solder the wire directly to the uC. I'm attaching the photos of both sides of the mb.