install internally ES24TX external ELRS module to Radiomaster TX16S | ExpressLRS Community | Page 1

cunning vapor Oct 23, 2022, 5:46 AM

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Hi!) Can anyone give an advice?

I have ES24TX (flashed with ELRS 3.0.1) from Happymodel - external module. And I'm trying to install it to Radiomaster TX16S (RM16S) internally. I've connected it instead of RM16S internal 4in1 multiprotocol module. Used 4 pins: INTMOD_5V | GND | INTMOD_RX | INTMOD_TX. Also installed EDGE TX and used the setting to CRSF protocol for internal module. But I can't access module with ELRS 3.0 lua script. It is just hanging on startup.

When I'm reconnecting the module to external pins - everything is working, but can't get it to work on internal TX/RX... Also tried to UART_INVERT check / uncheck in ELRS 3.0.1 firmware configuration..

What am I missing?

TX/RX swap also tried, in every combination with UART_INVERT option. Is it possible that UART_INVERT just not working in firmware? since even with UART_INVERT off/on - module still working normally on external pins.

attached Radiomaster TX16S in/ext module connector pinout

trail jasper Oct 23, 2022, 5:52 AM

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the es24TX is NOT a full duplex module.
the internal elrs modules uses 5 pins total

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rx
tx
gnd
vbat
boot_en

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here's the pin definition of the internal full duplex modules
https://github.com/ExpressLRS/ExpressLRS/blob/3.x.x-maintenance/src/hardware/TX/DIY 2400 DupleTX.json

GitHub

ExpressLRS/DIY 2400 DupleTX.json at 3.x.x-maintenance · ExpressLRS/...

STM32/ESP32/ESP8285-based High-Performance Radio Link for RC applications - ExpressLRS/DIY 2400 DupleTX.json at 3.x.x-maintenance · ExpressLRS/ExpressLRS

cunning vapor Oct 23, 2022, 6:02 AM

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trail jasper the es24TX is NOT a full duplex module. the internal elrs modules uses 5 pins to...

so is it possible to adapt to work internally anyhow?

trail jasper Oct 23, 2022, 6:03 AM

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cunning vapor so is it possible to adapt to work internally anyhow?

IF you can expose another pin suitable to be used as the RX or TX pin for that FULL duplex connection

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you can use the ESP32_EN or BOOT pin for the BOOT_EN pin (so you can use ETX Passthrough to flash the module)

cunning vapor Oct 23, 2022, 6:05 AM

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besides of this pin - on firmware side - is it also need to be changed something?

trail jasper Oct 23, 2022, 6:06 AM

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cunning vapor besides of this pin - on firmware side - is it also need to be changed something...

you don't have to change any, but you'll have to define your custom pin definitions..
i.e. you'll have to prepare your own json file where the pins are set/defined

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(that is if you used a different set of pins)

cunning vapor Oct 23, 2022, 6:07 AM

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Thank you! will try to handle that 🙂

trail jasper Oct 23, 2022, 6:08 AM

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IF I'm the one doing this, I'll either have to make my own PCB instead..
or wait for RM to sell those internal elrs modules 😄

cunning vapor Oct 23, 2022, 6:09 AM

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yeah, I also started to thinking that way))) since it seems not that easy))

trail jasper Oct 23, 2022, 6:09 AM

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the ES24TX esp chip pins aren't exacly easy to get to..

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it is doable, but just not worth it, imho

cunning vapor Oct 23, 2022, 6:10 AM

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yeah, thanks for advice!)

#install internally ES24TX external ELRS module to Radiomaster TX16S