[i=s]This post was last edited by yhye2world on 2019-8-15 15:10[/i]As shown below, RS232 to RS485 passive converter;
The terminal board on the RS485 port side is lost.Now I want to use a DB9 connector
When debugging MQTT, because multiple modules and the same program were used, it was found that during the debugging process, when one module was online, it would squeeze out the connection of another
Starting from now - June 16, the channel for exchanging TI points for chip points has been opened. During this period, the full amount can be exchanged according to the exchange rate. After June 24, t
I recently encountered a rather strange problem when I was studying the embedded development board nrf52832 and using the keil software for simulation. linking... .\Objects\Experiment.axf: Error: L621