# How do I get the xbee3 (NB-IoT) device to read a string from another device over a com port? **URL:** \ **Category:** XBee - Cellular\ **Tags:** uart, micropython, serial-communication, microcontroller, xbee3\ **Created:** [July 26, 2021, 9:28am UTC](https://forums.digi.com/t/how-do-i-get-the-xbee3-nb-iot-device-to-read-a-string-from-another-device-over-a-com-port/22567 "2021-07-26T09:28:17Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![CarlMisco](https://avatars.discourse-cdn.com/v4/letter/c/57b2e6/32.png) [@CarlMisco](https://forums.digi.com/u/CarlMisco)\ **Post date:** [July 26, 2021, 9:28am UTC](https://forums.digi.com/t/how-do-i-get-the-xbee3-nb-iot-device-to-read-a-string-from-another-device-over-a-com-port/22567/1 "2021-07-26T09:28:17Z")
I have a psoc4 BLE board that I’m trying to send a string (“Hello World!”) to the xbee3 over a UART connection. The Psoc4 board is attached to the PC over com9, and I have successfully sent a string to a Tera Term terminal over this connection. the UART is setup with a baud=115200, bits=8, parity= None, stop=1 Now I have the Xbee3 device connected over UART to a separate com port on the same PC. I’m having trouble figuring out how to get the xbee3 to receive the string of data. I don’t understand how to get the digi to listen for the psoc4 over the com port. Ultimately ill be sending this string to AWS I feel like I’m missing something relatively simple and I was hoping you guys could help point me in the right direction and explain what I’m looking for. ---
**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 26, 2021, 10:09am UTC](https://forums.digi.com/t/how-do-i-get-the-xbee3-nb-iot-device-to-read-a-string-from-another-device-over-a-com-port/22567/2 "2021-07-26T10:09:31Z")
You simply need to connect the Psoc4 board’s physical COM port to the XBee modules Physical COM port. Make sure you do this with the proper voltage level shifting.