# Xbee Pro 900hps wont talk to each other **URL:** \ **Category:** XBee Programamble (S2C & 900 HP)\ **Created:** [July 28, 2025, 4:43pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585 "2025-07-28T16:43:32Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Rocketmanandrew](https://avatars.discourse-cdn.com/v4/letter/r/ccd318/32.png) [@Rocketmanandrew](https://forums.digi.com/u/Rocketmanandrew)\ **Post date:** [July 28, 2025, 4:43pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/1 "2025-07-28T16:43:32Z")
I have been attempting to use [these](https://www.digikey.com/en/products/detail/digi/XBP9B-DMWT-022/3728684?s=N4IgTCBcDaIBoCEAKBOBBaAIgWQOoBV0AGMCAXQF8g) Xbees to transfer data from a home made flight computer to a Pi Pico. Both are 3.3V devices. I have defaulted both Xbees with a Sparkfun explorer board but they just wont talk to each other. My wiring is Xbee RX to TX and Xbee TX to RX on each side. I have been able to confirm my code is not the problem. Just kind of stuck now, not sure what to do. ---
**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\ **Post date:** [July 28, 2025, 4:49pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/2 "2025-07-28T16:49:37Z")
What is the exact part number of both XBee modules you are working with along with the firmware version installed on them? ---
**Author:** ![Rocketmanandrew](https://avatars.discourse-cdn.com/v4/letter/r/ccd318/32.png) [@Rocketmanandrew](https://forums.digi.com/u/Rocketmanandrew)\ **Post date:** [July 28, 2025, 5:02pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/3 "2025-07-28T17:02:45Z")
Just 2, i believe its the latest firmware. ---
**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\ **Post date:** [July 28, 2025, 5:05pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/4 "2025-07-28T17:05:46Z")
Rocketmanandrew, Can you please provide the exact part number as listed on the white label of the two modules. It will be something like XBP9Bxxxx Also please provide the exact firmware version number that is installed as it will make a difference on how the modules will react with the hardware you are working with. ---
**Author:** ![Rocketmanandrew](https://avatars.discourse-cdn.com/v4/letter/r/ccd318/32.png) [@Rocketmanandrew](https://forums.digi.com/u/Rocketmanandrew)\ **Post date:** [July 28, 2025, 5:05pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/5 "2025-07-28T17:05:50Z")
Sorry, miss read what you said, they are both XBP9B-DMWT-022. ---
**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\ **Post date:** [July 28, 2025, 5:06pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/6 "2025-07-28T17:06:56Z")
Is that the full part number listed on the label on both modules? ---
**Author:** ![Rocketmanandrew](https://avatars.discourse-cdn.com/v4/letter/r/ccd318/32.png) [@Rocketmanandrew](https://forums.digi.com/u/Rocketmanandrew)\ **Post date:** [July 28, 2025, 5:11pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/7 "2025-07-28T17:11:26Z")
Yes i believe so, i bought both at the same time so i’m assuming they should be the same. Firmware is 8075. Sorry about my confusion, i’m a little new to the Xbee world. ---
**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\ **Post date:** [July 28, 2025, 5:15pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/8 "2025-07-28T17:15:58Z")
Try setting the SL and SH of one unit to the DL and DH of the other. Then on the remote, just connect VCC, GND, and DI to DO. Then connect them to your PC and try running a range test with the XCTU software. It should give you good packets. If you do not use XCTU, then a simple terminal emulator will work. The key is that what you type in will be repeated back. ---
**Author:** ![Rocketmanandrew](https://avatars.discourse-cdn.com/v4/letter/r/ccd318/32.png) [@Rocketmanandrew](https://forums.digi.com/u/Rocketmanandrew)\ **Post date:** [July 28, 2025, 6:59pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/9 "2025-07-28T18:59:31Z")
Tried it but didn’t have any luck. ---
**Author:** ![Rocketmanandrew](https://avatars.discourse-cdn.com/v4/letter/r/ccd318/32.png) [@Rocketmanandrew](https://forums.digi.com/u/Rocketmanandrew)\ **Post date:** [July 28, 2025, 7:06pm UTC](https://forums.digi.com/t/xbee-pro-900hps-wont-talk-to-each-other/37585/10 "2025-07-28T19:06:42Z")
Never mind, i defaulted one of the boards and now for whatever reason it works. Thanks for the help!