Took a gamble on an ebay water irrigation valve in the hope I'd get a DCDC XR806 for testing.
It didn't work out, but it's an interesting device nonetheless. Here's a dump of photos and logs. To be added to as I discover more.
Meet the Diivoo WT-03/WG02 single-valve smart irrigation device. Smart Water Timer
boot log from CR3L A16
A13/RX+A0 pulled high. EF firmware dump. AmebaZ2 family. CR3L = RTL8720CM = W701M-VT2-CG
Decrypted Tuya KV content
Pairs with Tuya as a 'Gateway'

later I will explore the BT7L/Telink TLSR8250F512ET32 side.
keywords and bits:
ECF-SP10-WG02 Rev03 2022-8-5
ECF-WT03 REV1.0 20220509
FCC ID:2A4EPWT-03
Zhuhai Tessan Power Technology Co.,Ltd
https://fcc.report/FCC-ID/2A4EPWT-03/
KP3211SG (Kiwi Instruments PWM power switch)
BM8563 (Gatemode RTC)
CR3L dump: https://github.com/divadiow/FlashDumps/tree/main/IoT/RTL8720CM
It didn't work out, but it's an interesting device nonetheless. Here's a dump of photos and logs. To be added to as I discover more.
Meet the Diivoo WT-03/WG02 single-valve smart irrigation device. Smart Water Timer
boot log from CR3L A16
Code: Text
A13/RX+A0 pulled high. EF firmware dump. AmebaZ2 family. CR3L = RTL8720CM = W701M-VT2-CG
Decrypted Tuya KV content
Code: JSON
Pairs with Tuya as a 'Gateway'
later I will explore the BT7L/Telink TLSR8250F512ET32 side.
keywords and bits:
ECF-SP10-WG02 Rev03 2022-8-5
ECF-WT03 REV1.0 20220509
FCC ID:2A4EPWT-03
Zhuhai Tessan Power Technology Co.,Ltd
https://fcc.report/FCC-ID/2A4EPWT-03/
KP3211SG (Kiwi Instruments PWM power switch)
BM8563 (Gatemode RTC)
CR3L dump: https://github.com/divadiow/FlashDumps/tree/main/IoT/RTL8720CM