boot PIN on HappyModel EPW6 ELRS PWM receiver | ExpressLRS Community | Page 1

weak bronze Jul 11, 2025, 1:47 AM

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UPDATE: Pretend I didn't mention cyclone and instead I'm talking about a HappyModel EPW6 PWM Rx

I have this cheap cyclone ELRS PWM receiver and I'm looking to make it easy to flash it using an UART. I'd really like to avoid pressing the boot button, the CH1 signal is also labelled as BOOT.

Do I need to pull this pin high to 3.3V or low to GND to make it enter boot mode? Do I need to use a transistor, a simple resistor and can I keep it held either high or low, or does it need to be momentarily held when I power up and then must be removed. even if it has to be temporary an easier button than the SMD would make my life a lot easier.

Thanks for the help,

ruby saffron Jul 11, 2025, 5:40 AM

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!unsupported

ornate oarBOT Jul 11, 2025, 5:40 AM

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The ELRS team works closely with manufacturers to review and test hardware. It isn't until after testing that a specific Configurator target is added.

Hardware not listed in the Configurator means the hardware did not pass requirements, or the manufacturer has chosen not to collaborate. In this case the manufacturer should be contacted for support.

Take away message... Check the Configurator and support manufacturers that support open source and the ExpressLRS project 💪

weak bronze Jul 11, 2025, 5:51 AM

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How about this Happy model one. It also has a boot pin. How would i use that boot pin?

https://flymod.net/en/item/happymodel_expresslrs_epw6_900mhz

Happymodel ExpressLRS EPW6 900MHz 6CH PWM Receiver

Happymodel EPW6 receiver with ELRS protocol, frequency 915MHz m 6 channels. These receivers are used on flying wings and airplanes that do not need a

weak bronze Jul 11, 2025, 6:46 AM

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boot PIN on HappyModel EPW6 ELRS PWM receiver

ruby saffron Jul 11, 2025, 7:01 AM

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Well played. Pulling the PWM1 signal pin on the HM EPW6 to GND should have the same effect as pressing the boot button. Unsupported receivers will self destruct.

weak bronze Jul 11, 2025, 3:21 PM

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Thanks very much @ruby saffron !

#boot PIN on HappyModel EPW6 ELRS PWM receiver