Xpee3's GPIO max rate

Question

Hi all,

I want to communicate between Xbee3 RF (XK3-Z8S-WZM) and Load Cell Amplifier - HX711. The first idea is to write a MicroPython driver, but I noticed when HX711's PD_SCK pin (Xbee out) changes from low to high and stays at high for longer than 60µs, HX711 enters power down mode. So I started to look for max rate frequency of Xbee's GPIO. After checking all the documentation and a "bit" of google I couldn't find the max rate of the GPIOs.

Maybe I should consider another approach??

I'll appreciate any suggestions, or pointing me in the right direction.

Answer 1

The ADC/DIO function of the XBee 3 is 10 bit at 1000Hz or 1ms. Keep in mind that you are working with a zigbee enabled product. Your overall throughput will not be close to this rate. So you should be aware that you are going to need to take several samples before you can send this over the RF port.

Comments

Thanks for your answer. I'm not so worried about RF port. Want to sample the HX711 "locally", store it and report every hour or so.

Was hoping I won't need extra hardware, not looking bright tho...