CUCO Z0 R V1.2
There possibly a W701 chip under the cover, which is a RTL8720CF originally.
Grab the binary
From OpenBK7231T_App page.
You should take the one with RTL87X0C UART Flash this time.
Pick up your soldering iron
DO NOT POWER UP YOUR DEVICE FROM THE AC WHILE FLASHING
You will need the following pads from the IOT module:
- I00 – connect to 3.3V VCC
- TXLOG – connect to your 3.3V USB-TTL adapter’s RX
- RXLOG – connect to your 3.3V USB-TTL adapter’s TX
You will need the following pads from the PCB: - AMS1117’s left leg (pin 1) – connect to GND
- AMS1117’s middle leg (pin 2) – connect to 3.3V VCC
Start the flashing using ltchiptool
$ ltchiptool flash write /media/ramdisk/OpenRTL87X0C_1.18.2.bin
I: Available COM ports:
I: |-- ttyUSB0 - FT232R USB UART - FT232R USB UART - FTDI (0403/6001)
I: | |-- Selecting this port. To override, use -d/--device
I: |-- ttyS0 - ttyS0
I: Detected file type: Realtek AmebaZ2 Flash Image
I: Connecting to 'Realtek AmebaZ2' on /dev/ttyUSB0 @ 115200
I: Connect UART2 of the Realtek chip to the USB-TTL adapter:
I:
I: --------+ +---------------------
I: PC | | RTL8720C
I: --------+ +---------------------
I: RX | ------ | TX2 (Log_TX / PA16)
I: TX | ------ | RX2 (Log_RX / PA15)
I: | |
I: GND | ------ | GND
I: --------+ +---------------------
I:
I: Using a good, stable 3.3V power supply is crucial. Most flashing issues
I: are caused by either voltage drops during intensive flash operations,
I: or bad/loose wires.
I:
I: The UART adapter's 3.3V power regulator is usually not enough. Instead,
I: a regulated bench power supply, or a linear 1117-type regulator is recommended.
I:
I: In order to flash the chip, you need to enable download mode.
I: This is similar to ESP8266/ESP32, but the strapping pin (GPIO 0 / PA00)
I: has to be pulled *to 3.3V*, not GND.
I:
I: Additionally, make sure that pin PA13 (RX0) is NOT pulled to GND.
I:
I: Do this, in order:
I: - connect PA00 to 3.3V
I: - apply power to the device OR shortly connect CEN to GND
I: - start the flashing process
I: |-- Success! Chip info: RTL8720CF
I: Writing '/media/ramdisk/OpenRTL87X0C_1.18.2.bin'
I: |-- Start offset: 0x0 (auto-detected)
I: |-- Write length: 720.8 KiB (auto-detected)
I: |-- Skipped data: 0 B (auto-detected)
[################################################################] 100% I: Transmission successful (ACK received).
I: Transmission successful (ACK received).
I: |-- Finished in 94.556 sApply the template
{
"vendor": "Gosund",
"bDetailed": "0",
"name": "Gosund SP1",
"model": "SP1",
"chip": "RTL8720CF",
"board": "SP1-D-V1.5",
"flags": "1024",
"keywords": [
"CUCO Z0 R V1.2",
"TODO",
"TODO"
],
"pins": {
"2": "WifiLED;0",
"3": "Rel_n;0",
"4": "Btn;0",
"11": "Rel;0"
},
"command": "",
"image": "http://www.gosund.net/img/SP1-D.b37bfdf4.png",
"wiki": "https://www.elektroda.com/rtvforum/topic_YOUR_TOPIC.html"
}Enjoy
== Rtl8710c IoT Platform ==
Chip VID: 5, Ver: 3
ROM Version: v3.0
== Boot Loader ==
Aug 30 2024:04:22:00
Boot Loader <==
== RAM Start ==
Build @ 23:17:21, Jan 4 2025
interface 0 is initialized
interface 1 is initialized
Initializing WIFI ...Entering initLog()...