No signal on APM2.0 UART0 and XBEE issue

Hi

My setup is as following:

APM 2.0

XBee-PRO 900 extended range module w/ RPSMA connector  (Laptop Side)  XBP09-DM Firmware 1061

DIYDrone XtreamBee USB Adapter (Laptop Side)

XBee-PRO 900 extended range module w/ wire antenna (APM 2.0 side) XBP09-DM Firmware 1061

DIYDrone XtreamBee Board (APM 2.0 Side).

  • I’m able to successfully test Airlink between the two XBEEs using X-CTU and loopback.
  • I’m able to receive test text over the air link when I use serial testing sketch on APM2.0 board, connecting the XBEE to the side UART0
  • I soldered the UART0/2 MUX jumpers on the bottom of APM 2.0 to select UART0

My 1st Issue is I’m not able to see any signal on the back UART0 connector even when I load the serial test sketch which is giving perfect output on the side UART0. Is this a known bug in APM 2.0 board ?

My 2nd Issue is that I’m not able to establish telemetry over the airlink, I tried 57K & 115K baud rates, I tried HKGCS & APM Planner but no luck (Even when using the long side UART0 port)

Please help me.

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Replies

  • Chris,

    UART0 is as shown, no need to change the wiki if the issue is not common. 3692406550?profile=original

  • 3D Robotics

    Muthanna,

    I'm not sure I'm following. Where is the UART0 that you're referring to? The images in the wiki refer to the standard setup, which is what I use.

    Maybe some boards shipped from the factory with a missing/broken microtrace for the UART selection? If so, we'll correct that. But I'm not understanding why the manual recommendations should change, since that's what thousands of people already use.

  • Chris,

    APM2.0 photo you just posted has Ver 2.4.1 on it, mine is Ver 2.4 (I bought it from 3DR almost one month ago); is there any difference related to our issue ??

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