problems getting turnigy 9X tx/rx commands

[swangy]

Hi guys, this is my first quad build so i'm struggling with the details.

the short story is i'm using the multiwiicopter 1.7 platform and the GUI is showing when i push up the throttle, both throttle and pitch jump up (or yaw or roll depending on which pin i swap). here's the setup so far:

arduino pro mini 5v/16mhz with wii WMP + NK - these work fine
warthox shield
turnigy 9X tx/rx - got these to bind just fine.. i think

i havent plugged in ESC or motors or anything

so the arduino is powered via USB, turnigy Rx powered by a separate 5.0V supply. Just the signal pin is plugged in, not using 5V or grnd
chan 1 -> roll pin on shield
chan 2 -> nick
chan 3 -> throttle
chan 4 -> yaw

the 9X Tx is set to mode 2 FM-PPM and i can watch under 'display' that the throttle is incrementing when i push the throttle stick.

so the GUI shows both throttle and roll going up now. they respond appropriately - up when i push up, down when i push down.. just on both.

wtf is goin on? i've tried getting arduino code to read out raw PPM signals from the receiver, but it's not decoding correctly. wtf is goin on?

[PatrikE]

It sounds like you could have a Helimix in the radio.
120 swach or something...

Make shure you have a "ACRO" mode.

Mode2 FM-PPM is correct with.
chan 1 -> roll pin on shield
chan 2 -> nick
chan 3 -> throttle
chan 4 -> yaw

God luck..

/Patrik

[swangy]

hmm i thought about that, but definitely checked and reselected acro mode... the little picture is definitely an airplane. i'l try glider mode too now.

unless there's somewhere else for 'mixing' modes?

[cardboard]

you haven't got a common ground between the arduino and the receiver??? i found that when i first made mine it had the exact same problem until i grounded the receiver to the arduino.

Hope this helps

[cardboard]

*update, i used the same TX RX combo as well so i can confirm that when set up rite it does work

[captaingeek]

I have this radio working as well.

Question - on the RX, arent all of the GND and 5V pin's bridge? In that case you only need 1 connected.

[cardboard]

correct they are all common. if i am not mistaken all receivers are made like this. so in response to your question only one ground and +ve need to be connected up.
extending this topic you should only use one of the esc as your bec (unless your using a separate bec), having multiple becs connected may cause issues.

[swangy]

i'll try to use the same common ground.. guess i was asking for trouble on that one. but it's so easy to power the promini from the usb programmer, and the rx separately! no good deed goes unpunished i guess.

i havent even involved any ESC's BEC yet, but i've seen all the posts warning me to use only one BEC output. when i get the rx/tx working well together i'll try that.

thanks for all the advice, keep 'em coming.

[swangy]

common ground was the problem! fixed, time to mount the ESCs and motors.. can't wait to see this thing fly!

thanks for all the help!

[cardboard]

anytime, hope she flys good for u