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Identifying Chip in MOES WS-SR-EU-L Wi-Fi Switch for OpenBK7231T_App

viuvasas 1023 11
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  • #1 21508644
    viuvasas
    Level 2  
    Posts: 6
    Rate: 1
    I bought MOES Wi-Fi light switch from AliExpress (https://aliexpress.com/item/1005008574435831.html). But I'm not sure what chip it has.
    Model: WS-SR-EU-L

    White, square light switch on a wooden surface. Moes smart switch with technical specifications. Printed circuit board with various components on a wooden surface. A printed circuit board with various electronic components. Close-up of an electronic module with visible PCBs and SMD components. Close-up of an electronic circuit with components on a printed circuit board.

    Can anyone please help me to identify chip? Is this chip supported by OpenBK7231T_App (https://github.com/openshwprojects/OpenBK7231T_App)
    I cannot find anything similar in the elektroda.com forum. Any help or link to any documentation or article will be helpful.
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  • #2 21508751
    divadiow
    Level 38  
    Posts: 4850
    Help: 421
    Rate: 854
    Can't say I recognise that module, nor can I find reference to it anywhere else. Are you able to spy anything beyond those capacitors?

    Circuit board with capacitors and integrated circuits
    Are you planning on removing the module for a better look?
  • #3 21509162
    viuvasas
    Level 2  
    Posts: 6
    Rate: 1
    I unsoldered one capacitor.
    Close-up of a circuit board with an unsoldered capacitor.Close-up of a circuit board with visible capacitors and electronic components.
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  • #4 21509177
    divadiow
    Level 38  
    Posts: 4850
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    Please remove the QR code sticker to reveal main chip
  • #5 21509254
    viuvasas
    Level 2  
    Posts: 6
    Rate: 1
    I removed the QR code sticker.
    Label with QR code and serial number on a light background.Close-up of a circuit board with capacitors and integrated circuits.Close-up of electronic components on a circuit board, including an electrolytic capacitor.Close-up of an electronic component on a circuit board, including a blue electrolytic capacitor.
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  • #6 21509270
    divadiow
    Level 38  
    Posts: 4850
    Help: 421
    Rate: 854
    oh! I was expecting a proper MCU behind there. um.

    Added after 3 [minutes]:

    I'm confused. Where's the MCU? What's doing wifi and broadcasting for app pairing? Did you confirm it discoverable before taking it apart?
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  • #7 21509286
    miegapele
    Level 16  
    Posts: 173
    Help: 15
    Rate: 29
    Wifi chip is usually on the pcb which connects to that 8 pin header. Please show that one.
  • #8 21509328
    viuvasas
    Level 2  
    Posts: 6
    Rate: 1
    Finally, I found a Wi-Fi chip. It is AXYU. As I understand, it is supported by OpenBK7231T_App?
    Disassembled wall module with AXYU Wi-Fi chip on a table.Close-up of a circuit board with a Wi-Fi module labeled AXYU.
  • #10 21516490
    viuvasas
    Level 2  
    Posts: 6
    Rate: 1
    I have problems to back up the firmware using guide (https://www.elektroda.com/rtvforum/topic4111822.html). The 'download' step is success. However, during 'flash' step I'm getting error:

    RECV_RSP: recv magic is error!
    UP_FLASH: meet error when request the trunk 1, pos: (0x400, 0x400)
    read FLASH failed!

    I tried to set read length of 0x400000 and 0x200000. The same error.

    Screenshot of RDTool v1.0.21 software for software development.Screenshot of RDTool application version 1.0.21 showing a memory flashing interface.
  • #11 21516807
    divadiow
    Level 38  
    Posts: 4850
    Help: 421
    Rate: 854
    Not sure I've encountered this error before. Tried standard things like lowering baud? Are your wires short and soldered?
  • #12 21517418
    viuvasas
    Level 2  
    Posts: 6
    Rate: 1
    I attempted to re-solder the RX and TX wires, but ran into issues during the 'flash' step while trying to back up the firmware. So, I decided to skip the backup and proceed with flashing the OpenECR6600 firmware instead. The flashing was successful, and I was able to connect to the Wi-Fi network. Next, I'll work on configuring the pins.
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Topic summary

✨ The discussion focuses on identifying the main chip used in the MOES WS-SR-EU-L Wi-Fi light switch purchased from AliExpress. Initial images showed only capacitors and an 8-pin header, with no visible MCU. After removing a QR code sticker, the main chip was revealed to be an AXYU ECR6600 Wi-Fi chip. This chip is confirmed to be supported by the OpenBK7231T_App firmware. Attempts to back up the original firmware using the recommended guide resulted in errors during the flash step, specifically "RECV_RSP: recv magic is error!" and "read FLASH failed." Troubleshooting included checking wiring and baud rate, but the issue persisted. Ultimately, the user skipped backing up the original firmware and successfully flashed the OpenECR6600 firmware, achieving Wi-Fi connectivity and planning to configure GPIO pins next.
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FAQ

TL;DR: "Yes, ECR6600 is supported." Make 1 backup, then flash OpenECR6600 on MOES WS‑SR‑EU‑L. [Elektroda, divadiow, post #21509359]

Why it matters: This FAQ helps MOES WS‑SR‑EU‑L owners identify the AXYU/ECR6600 module, fix backup errors, and flash safely.

Quick Facts

How do I identify the Wi‑Fi chip in a MOES WS‑SR‑EU‑L?

Check the small RF module on the board connected via an 8‑pin header. That daughterboard typically carries the Wi‑Fi SoC. Photograph its silkscreen for markings. If unsure, share the module photo for confirmation. [Elektroda, miegapele, post #21509286]

Is the ECR6600 supported by open firmware?

Yes. “Yes, ECR6600 is supported.” Make a backup before flashing to stay safe. This confirmation comes from an experienced forum contributor. You can proceed with an ECR6600‑targeted build. [Elektroda, divadiow, post #21509359]

What markings should I look for on the radio module?

Look for the vendor marking on the module can or PCB. In this case, the module was marked AXYU. Photograph close‑ups to confirm chip family from the community. [Elektroda, viuvasas, post #21509328]

Where is the MCU/Wi‑Fi SoC located in this switch?

It’s not on the main logic area under stickers. The Wi‑Fi SoC sits on the small daughterboard linked by an 8‑pin header. Focus your inspection there. [Elektroda, miegapele, post #21509286]

Should I test if the switch is discoverable before disassembly?

Yes. Power the device and confirm it’s discoverable or enters pairing mode first. It helps isolate hardware issues from firmware ones during teardown. [Elektroda, divadiow, post #21509270]

How do I flash OpenECR6600 and get the device online?

  1. Flash the OpenECR6600 firmware to the module.
  2. Connect to the device’s Wi‑Fi network after flashing.
  3. Open the web UI and continue with pin configuration. This sequence worked for the reported unit. [Elektroda, viuvasas, post #21517418]

What if backup fails with “RECV_RSP: recv magic is error!”?

Treat it as a link‑quality issue first. Lower the UART baud rate, keep wires short, and solder RX/TX securely. Stable wiring often clears read errors. Avoid long jumpers and poor clip contacts. [Elektroda, divadiow, post #21516807]

What read length should I try when backing up ECR6600 flash?

Typical attempts are 0x400000 (4 MB) and 0x200000 (2 MB). One report saw the same error with both lengths, pointing to connection issues instead. Fix wiring and baud before changing sizes. [Elektroda, viuvasas, post #21516490]

Do I need to remove stickers or parts to identify the chip?

Not necessarily. Removing the QR sticker did not reveal an MCU in this unit. The radio SoC was elsewhere, on the daughterboard module. [Elektroda, divadiow, post #21509270]

Can I skip the backup and still flash successfully?

One user skipped the backup after errors, flashed OpenECR6600, and the device AP came up. They proceeded to pin configuration afterward. This worked on their unit. [Elektroda, viuvasas, post #21517418]

Which firmware image should I use for this module?

Use the ECR6600‑targeted build (often referred to as OpenECR6600). A user confirmed successful flashing and connectivity with that image. [Elektroda, viuvasas, post #21517418]

Where can I find a step‑by‑step guide for ECR6600 flashing?

Refer to the ECR6600 support thread linked in the discussion. It covers download, flash, and troubleshooting flow used by the community. [Elektroda, viuvasas, post #21516490]

Any tips for reliable UART wiring on these modules?

Yes. Solder RX/TX and ground securely, keep leads short, and lower baud if unstable. These basics improve read and flash reliability significantly. [Elektroda, divadiow, post #21516807]

What exactly was found inside this MOES WS‑SR‑EU‑L?

The radio module carried AXYU branding, leading to the identification that enabled an ECR6600‑based firmware path. Clear photos helped the forum confirm it. [Elektroda, viuvasas, post #21509328]
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