Aura 5 with ER5A

[jrbrodie77]

Greetings,

I’ve got a radiomaster ER5A and the Flite test branded pocket ELRS radio. I’ve tried setting my ER5A to sbus and I just can’t get the aura to show connected to the receiver.

Can someone confirm the connections? I just connect the aura’s bus port to the receiver’s servo 2 port?

Any tips? I’ve wasted so much time I’m tempted to dump all this and get a receiver with built in controller.

 

[LitterBug]

There should have been several cables that plug in to the port on the side of the ER5A. There should be one with a three pin servo like connector. That is the one you want to use. Plugging in to the PWM ports will NOT work. It must be the serial port.

 

[jrbrodie77]

The ER5A has no such serial port. In its web UI, it has some settings for switching the PEM ports 2&3 into SBUS. This is mentioned in a flite test video, I just can’t get it to work.

 

[LitterBug]

You must have one of the early ER5As. I have one around here somewhere. I'll see if I can get it set up.

Did you try PWM port 3? If the PWM ports are used for serial, one will be RX , and the other will be TX. you want the TX port to "transmit" to the Aura5.

Can you take a picture of your ER5A web page where you configured the serial port?

 

[jrbrodie77]

You must have one of the early ER5As. I have one around here somewhere. I'll see if I can get it set up.

Did you try PWM port 3? If the PWM ports are used for serial, one will be RX , and the other will be TX. you want the TX port to "transmit" to the Aura5.

Can you take a picture of your ER5A web page where you configured the serial port?

Thanks, I’ll try that. My battery just swelled and failed, so I knew to get a new one before I can try this again, or rig up a power supply or something. Appreciate the help.

 

[LitterBug]

You must have one of the early ER5As. I have one around here somewhere. I'll see if I can get it set up.

I have been looking for my OG ER5A for two months now. Seems I buried it good when preparing for Flite Fest, gave it away at Flite Fest, or just flat lost it. BAH.

Simpler solution which I HAVE used with the aura 5 is to use an ELRS serial RX like the XR2 nano or XR1-2400

RadioMaster XR1 Nano Multi-Frequency ExpressLRS Receiver

Download User XR1 Manual Features Telemetry RF power: 100mW ExpressLRS 2.4GHz or Sub-G 900MHz ESP32C3 high-performance MCU Semtech LR1121 2.4GHz & Sub-G 900MHz Transceiver Secondary UART port Castled pads for easy soldering Specification Item: XR1 Nano Multi-Frequency ExpressLRS Receiver Type...

www.buddyrc.com

RadioMaster XR2 Nano 2.4GHz ExpressLRS Receiver - RMRC

Ultra-compact RadioMaster XR2 Nano 2.4GHz receiver with low latency, high refresh rates, and integrated tower antenna for superior performance.

www.readymaderc.com

 

[jrbrodie77]

For reference, after wasting hours on the ER5A, I got an email back from RadioMaster. EVEN THOUGH the configuration UI for the ER5a shows SBUS, indicates which PWM ports to use etc. It is not compatible with SBUS.
I ended up buying one of the nano receivers, we'll see if that works! Thanks for you help.

 

[LitterBug]

Yeah, I still haven't found my first gen ER5A, but am pretty sure it was the wrong chipset to do serial on the PWM ports. The newer ones have the better processor.

 

[LitterBug]

Oh cool! Just found my ER5A in the bottom of my flight bag where I looked 10x before. Appears dumping everything out was better for locating things than moving things around in the front pocket. I have it set up in the WIFI interface for serial. Now to test........,

 

[LitterBug]

SUCCESS!!! My ER5A settings page is above. I am on ELRS version 3.5.2.

NOTE: The Aura 5 board and the configurator sometimes need to be completely restarted after making changes. I found that rebooting was necissary in this case, INCLUDING restarting the Configurator!!!.

TX (PWM2) is connected to the S.BUS connector on the Aura 5

aura 5 config below

 

[LitterBug]

ELRS serial "SBUS" connection to FT Aura 5. Most of the newer PWM RXs have a dedicated serial port rather than using the PWM pins.