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--- projects:arlec_smart_fans:overview [2023/10/30 11:15] – tjhowse
+++ projects:arlec_smart_fans:overview [2023/11/01 04:57] (current) – tjhowse
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 ====== Smart fan ======
-I bought an Arlec smart fan. It has a WR4 wifi module inside, supposedly based on an RTL8710BN. These are now supported by esphome.
+I bought an Arlec smart fan. It has a WR4 wifi module inside, based on an RTL8710BN. These are now supported by esphome.
 https://docs.libretiny.eu/docs/platform/realtek-ambz/#flashing
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 https://developer.tuya.com/en/docs/iot/wifiwr4module?id=K9605tvu78p3e
+{{:projects:arlec_smart_fans:pasted:20231030-112019.jpeg}}
+{{:projects:arlec_smart_fans:pasted:20231030-112042.png}}
 {{:projects:arlec_smart_fans:pasted:20231030-033719.jpeg}}
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 {{:projects:arlec_smart_fans:pasted:20231030-080423.png}}
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 <code>
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     warm_white_color_temperature: 400 mireds
 </code>
+Initial flashing done with a USB-TTL serial adaptor using the wiring diagram shown above and ltchiptool. I took a backup of the stock firmware with <code>ltchiptool flash read ambz stock.bin</code> then I used esphome to generate the uf2 file and flashed it using <code>ltchiptool flash write <filename>.uf2</code>
+ Works mostly perfectly. OTA updates via wifi only work occasionally, perhaps inside a 30-60 second window after the RTL chip powers on. It takes a fair bit of bouncing the power and retrying the connection to get it to stick.