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pascallanger / DIY-Multiprotocol-TX-Module

Multiprotocol TX Module (or MULTI-Module) is a 2.4GHz transmitter module which controls many different receivers and models.
https://www.rcgroups.com/forums/showthread.php?t=2165676&goto=newpost
GNU General Public License v3.0
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Poor range Spektrum AR630 #607

Open oryfoxer opened 3 years ago

oryfoxer commented 3 years ago

Very poor range on Spektrum AR630 receiver. Range check took me 80 feet before I lost signal. Tried different Spektrum firmwares and all produced the same results.

Tried DSMX 2F and DSM2. Both produce the same issues.

OpenTX 2.3.14 MPM 1.3.2.86 TX16S

Tried disabling telemetry and channel map, nothing resolved the issue.

pascallanger commented 3 years ago

The range check feature is common to all protocols and does not match the original manufacturer. You have to set your own rule based on your experience.

oryfoxer commented 3 years ago

On a 636a and a 637T I can range check to 200 ft. So, there is still a performance issue with this receiver, despite not being set to manufacturer specifications.

oryfoxer commented 3 years ago

If you live in the states, I can send you this receiver for testing. There seems to be a problem with the newer stuff.

I had a 637T that was giving me issues with range, then I upgraded it to the latest Spektrum firmware and the issue went away.

pascallanger commented 3 years ago

I live in France. One thing you could test if you compile the code by yourself (explained on this github) is to enable frequency tunning on channel 15: https://github.com/pascallanger/DIY-Multiprotocol-TX-Module/blob/1a921b1cdb9947707475211d53c324ee60cff75c/Multiprotocol/_Config.h#L129 By assigning a pot on channel 15 and turning it slowly, you could see if the range is improving.

oryfoxer commented 3 years ago

No luck, not sure what the issue is.

The only thing I can think is this is a bad RX or there is a compatibility issue with this RX. I replaced the RX in the airplane with a 636A and the issue is completely gone. I can range test to about 200ft before issues start to arise.

I gave it some thought and if you are comfortable with it, I will mail you the RX. Shipping to France is about $12 for the weight.

If no one else is reporting issues with this reciever, it may just be a bad one.

Let me know how you want to proceed.

pascallanger commented 3 years ago

@oryfoxer Can you confirm that you've tested the frequency tunning? I'm fine if you want to send me the RX. I can have a look but I can't guarantee I can fix it. If you are fine sending it and want the RX back please consider the cost of shipping back.

oryfoxer commented 3 years ago

@oryfoxer Can you confirm that you've tested the frequency tunning? I'm fine if you want to send me the RX. I can have a look but I can't guarantee I can fix it. If you are fine sending it and want the RX back please consider the cost of shipping back.

I wasn't expecting it back. Just sending it to support the project. Like to see the Spektrum stuff supported and working as intended.

pascallanger commented 3 years ago

I wasn't expecting it back. Just sending it to support the project. Like to see the Spektrum stuff supported and working as intended.

Sounds good. Could you contact me on rcgroups user hpnuts? or using the email you see when sending a paypal donation.

oryfoxer commented 3 years ago

The AR630 has been shipped via USPS. Not sure how long it will take to receive.

frankiearzu commented 1 year ago

Just a comment on this ones... the AR630 don't have external antennas.. so is very vulnerable to obstructions (like a battery, esc, etc). Has to be installed far away from those. Since no antenna, the range is lower to the equivalent AR631 (w antenna). I had one and i reserved it for park flyer and short range (definitely not motor-Gliders). For example, when doing range test walking about 50m/150' both has signal, but with the AR630 if i start rotating the plane around, the blockers starts to affect,, AR631, not a problem.