Hi
Is there any way to connect it to a RS485 driver? Maybe in some configuration a GPIO or RTS can be used to handle the TX-Enable pin of the RS485 driver when data has to be sent from Wi-Fi to the USART. There are others bridges that do it as FTDI (to USB, using TXEN), or Digi Connect Wi-Me (using RTS Toggle config). It is a pitty if it doesn’t have support, because it is an useful feature, and easily implemented in firmware.
Thanks
Juan
You could use an RS485 driver in RS232 configuration by using two pairs. Then there is no need for a ‘direction’ control signal but you get the long distance differential pair driver/receiver advantage.
Sorry,that is not a solution. I need to use a half duplex RS485. I must drive the tx_enable pin of the chip (sn75176). also We can’t do it because Our products work with 2 wires RS485
A quick look at the data sheet shows that GPIO_13 is labeled as UART_RTS. If you can configure the UART for half duplex mode, then in order to send data, it should raise RTS high and wait for the microcontroller to raise CTS high.
To be clear. RN-171 should drive the Rs485 chip in the same way that FT232RL does. Please see FT232RL’s datasheet and the TXEN pin functionality