Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 (15-Jan-2020, 11:19 PM)SnowLeopardFPV Wrote: The return path for the S.Port signal is the GND connection, so you at least need GND connected to the transmitter as well. I would just wire all the connections to the transmitter - GND, 5V, and S.Port. Oh my days!! You're literally a godsend! Everything is now working and being displayed in betaflight perfect. I literally can't thank you enough! Such an easy fix though, I would've never thought of doing that Again, thanks for all your time and effort ![[-]](https://intofpv.com/images/collapse.png) • Posts: 21,400 Threads: 594 Likes Received: 9,029 in 6,683 posts Likes Given: 1,428 Joined: Jun 2018 Reputation: 795 No problem, and great news  Another quad in the air  Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 Ah great, another problem. Well hi again, flew my quad when I got everything working very well. I was powering my receiver with a tbs unify pro 5v output and worked fine. Turns out I had a faulty batch of the unfiy so I had to go back to another VTX which does not have a 5v out. So, I connected my R9MM to a 5v from my FC led area, and then to a ground somewhere else on the board. Only problem now, is that nothing works. I don't even get a status light on the R9MM itself  Do you think I somehow messed it up? I don't solder directly to the R9MM, I use the pins so I don't run ask much risk of touching the receiver with my soldering iron by accident, and my iron has never come in contact with it. I did a double-check over the connections, they're all secure and nothing is bridging. Heres my fc diagram (Its on page 7) https://emax-usa.com/download/Buzz_Instr...l_v1.3.pdf I've got my 5v connected to the LED_STRIP 5v, and my ground connected to the Sbus/PPM ground. I would've connected it to the LED ground or the SBUS 5v out but they were both already being used. Help? Thanks a lot. • Posts: 21,400 Threads: 594 Likes Received: 9,029 in 6,683 posts Likes Given: 1,428 Joined: Jun 2018 Reputation: 795 Are you powering using a LiPo? Some of the 5V pads on some boards only power up with a LiPo connected (not USB), while the 5V pad specifically labelled for use with a receiver usually powers up with just a USB cable connected. Try this if you haven't already done so. Don't forget props off and make sure a VTX antenna is attached when connecting a LiPo on the bench. If that doesn't work then use a multimeter to check if you are actually getting 5V on the LED strip pad. • Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 Yeah, I tried it with USB and also a Lipo, still nothing. Can't get hold of a multimeter until the weekend so I guess I'll have to wait until then! I'll update this thread if that's the issue or not. • Posts: 21,400 Threads: 594 Likes Received: 9,029 in 6,683 posts Likes Given: 1,428 Joined: Jun 2018 Reputation: 795 23-Jan-2020, 08:29 PM (This post was last modified: 23-Jan-2020, 08:30 PM by SnowLeopardFPV.) What is connected to the 5V pad on the SBUS/PPM bank of pads? Does whatever that is power up at all with either USB or a LiPo connected? • Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 Its an external buzzer, and it does charge up when the USB and/or lipo is connected since it used to be the 5v of my old xm+ • Posts: 21,400 Threads: 594 Likes Received: 9,029 in 6,683 posts Likes Given: 1,428 Joined: Jun 2018 Reputation: 795 In that case just piggyback the 5V wire from the R9MM onto the back of the one for the buzzer. There is nothing that says you're not allowed to connect more than one device to a 5V pad. It can sometimes just be a bit tight, that's all. • Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 Ok thanks I'll try that tomorrow • Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 Update, still nothing • Posts: 21,400 Threads: 594 Likes Received: 9,029 in 6,683 posts Likes Given: 1,428 Joined: Jun 2018 Reputation: 795 (24-Jan-2020, 06:21 PM)damajesticmuffin Wrote: Update, still nothing OK, if your external buzzer is powering fine and charging from the same 5V pad as you have now connected the R9MM receiver to then it sounds like you have a dead R9MM. Do you have any ability to connect the receiver to a 5V source that is totally isolated from the FC to see if any LEDs on it come to life on the R9MM? • Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 Yep, I've got one little 5v pad from one of my old (and working) FCs. I'll try and connect it to that tomorrow and see if that helps.
If not, really quite annoyed because I didn't even get to fly more than 30 seconds with the R9M system. Probably end up returning it or selling it on for repairs if it doesn't work and then just make the break for crossfire. • Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 Nope, still nothing. No lights come on at all • Posts: 21,400 Threads: 594 Likes Received: 9,029 in 6,683 posts Likes Given: 1,428 Joined: Jun 2018 Reputation: 795 Try re-flashing the firmware to the R9MM. Of course, if the power circuit or MCU on it are already fried then it's not going to work. But worth a try as a last ditch effort. • Posts: 66 Threads: 14 Likes Received: 4 in 3 posts Likes Given: 10 Joined: Jun 2019 Reputation: 0 Yeah, not even any LEDs come on, it's completely dead I think.
Looks like I'll be returning the module for a refund and try to get a refund for the R9MM (doubt I will) and just go to crossfire. In the meantime, I'll use my xm+.
Thanks a lot for your help anyway • |
