Serial port possibilities

isahunter · Post by **isahunter** » Tue Nov 27, 2012 10:34 pm

Hi this is my firts post

my name is isaac i am developer and i wanna know if is possible control (fly) the multiwii why a serial port.
i have great ideas using this

thanks for looking at this post and a response would be great

regards

dramida · Post by **dramida** » Tue Nov 27, 2012 10:45 pm

Welcome aboard Isac. You can use #define rcserial option in config.h to enable serial control over MWC.

kataventos · Post by **kataventos** » Tue Nov 27, 2012 10:48 pm

isahunter wrote:Hi this is my firts post my name is isaac i am developer and i wanna know if is possible control (fly) the multiwii why a serial port.
i have great ideas using this

thanks for looking at this post and a response would be great

regards

Yes, like dramida said... and that gave me another idea!
Please see: viewtopic.php?f=8&t=2789

With that idea I may think in bypassing the FRSky... and go to another way to control my drone.

isahunter · Post by **isahunter** » Tue Nov 27, 2012 11:04 pm

thanks for the reply, i want develop a autonomous drone

dramida · Post by **dramida** » Tue Nov 27, 2012 11:12 pm

Multiwii is an open source project witch reach its maturity. It integrates all sensors you need for autonomous navigation. RIght now MWC is on the verge of Waypoint navigation through telemetry. You can contribute to that.

kataventos · Post by **kataventos** » Tue Nov 27, 2012 11:14 pm

dramida wrote:Multiwii is an open source project witch reach its maturity. It integrates all sensors you need for autonomous navigation. RIght now MWC is on the verge of Waypoint navigation through telemetry. You can contribute to that.

+1

Eric · Post by **Eric** » Wed Nov 28, 2012 1:52 am

I am currently control my quad with an iPhone though WiFi.
An TPLINK WR703N which is only 36g was connected to the serial port.
The tplink router is flash to openwrt, runs as a hotspot, connect its serial port to Arduino.
Rc command currently sent as 25hz.

isahunter · Post by **isahunter** » Wed Nov 28, 2012 3:52 am

Eric wrote:I am currently control my quad with an iPhone though WiFi.
An TPLINK WR703N which is only 36g was connected to the serial port.
The tplink router is flash to openwrt, runs as a hotspot, connect its serial port to Arduino.
Rc command currently sent as 25hz.

Really? sounds great especially for the value

I think the serial port and the drones have many things to say.

Eric · Post by **Eric** » Wed Nov 28, 2012 4:14 am

It's ok to send RC in 50hz.
I changed the serial.ino a bit to save serial bandwidth.
Adding a new MSP_SET_RAW_RC_REPEAT. When no channel changes, this MSG will be sent. And no ack will be sent for this MSG.

All MSP_SET_RAW_RC will be ack'ed so we do not miss channel data.

115200 is enough, we can do simple math to calc the bandwidth required.

By the way, to use serial instead of RX, we get six more digital port to connect sonar and optical sensor. (my setup)

The router has a USB port, we can use it to connect gps or webcam.

Mine connects a webcam, and stream 720p video to iPhone.

Sounds good?

isahunter · Post by **isahunter** » Wed Nov 28, 2012 4:30 am

I find it awesome :O , but it's different from what i want to develop. but the use of the serial port is correct and gives me some extra ideas: P

qube · Post by **qube** » Wed Sep 25, 2013 10:43 pm

Eric wrote:
ImageUploadedByTapatalk1354072053.799524.jpg
It's ok to send RC in 50hz.
I changed the serial.ino a bit to save serial bandwidth.
Adding a new MSP_SET_RAW_RC_REPEAT. When no channel changes, this MSG will be sent. And no ack will be sent for this MSG.

All MSP_SET_RAW_RC will be ack'ed so we do not miss channel data.

115200 is enough, we can do simple math to calc the bandwidth required.

By the way, to use serial instead of RX, we get six more digital port to connect sonar and optical sensor. (my setup)

The router has a USB port, we can use it to connect gps or webcam.

Mine connects a webcam, and stream 720p video to iPhone.

Sounds good?

Eric - what kind of Software are you using on the iPhone-Side? I have searched all over for an App for Jailbroken Phones which makes use of the serial port in the dock-connector but could not find any. Would be great to try your solution.

Cerber · Post by **Cerber** » Mon Sep 30, 2013 8:24 am

Hello, everyone.

I'm also trying to control multiwii via serial. I have an openwrt router and I want to send RC data via USB.
Here is mentioned about RCSERIAL, but I couldn't find any using of it in latests versions (2.2, pre 2.3). Maybe I need some older version?
But I found that serial reading is used under TEENSY20 and SBUS. So I can enable both to read from serial port, but I don't know how to generate correct s-bus message.

crashlander · Post by **crashlander** » Mon Sep 30, 2013 9:25 am

RCSERIAL is always on in newer _shared (developer) on all serial ports (1 on ProMini, 2 on Leonardo , 4 on Mega).
So the only thing to do is to send properly formed MSP_SET_RAW_RC commands to it and they will override standard RC system.

Regards
Andrej

qube · Post by **qube** » Sun Oct 27, 2013 5:32 pm

Alright - since I never got any answer, neither in this thread nor from "Eric" over direct message, I am assuming, that a control of Multiwii via an iOS-App (As schon in the pictures by Eric on page 1 of this thread) is not possible, has not been done before and therefore seems to be impossible.

Eric, if you are reading this thread and indeed have an app which works - please let me know.

Thank you.

arne

MultiWii