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examples: fix the RS485 line driver in the readme

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Closes https://github.com/espressif/esp-idf/issues/8132
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aleks 2022-09-29 10:01:29 +02:00
parent c61910c267
commit 7903952281
1 changed files with 2 additions and 2 deletions
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4
examples/peripherals/uart/uart_echo_rs485/README.md
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@ -13,7 +13,7 @@ The approach demonstrated in this example can be used in user application to tra
### Hardware Required ### Hardware Required
PC + USB Serial adapter connected to USB port + RS485 line drivers + Espressif development board. PC + USB Serial adapter connected to USB port + RS485 line drivers + Espressif development board.
The MAX485 line driver is used for example below but other similar chips can be used as well. The MAX483 line driver is used for example below but other similar chips can be used as well.
#### RS485 example connection circuit schematic: #### RS485 example connection circuit schematic:
``` ```
@ -22,7 +22,7 @@ The MAX485 line driver is used for example below but other similar chips can be
+-------x-------+ +-------x-------+ +-------x-------+ +-------x-------+
RXD <------| RO | | RO|-----> RXD RXD <------| RO | | RO|-----> RXD
| B|---------------|B | | B|---------------|B |
TXD ------>| DI MAX485 | \ / | MAX485 DI|<----- TXD TXD ------>| DI MAX483 | \ / | MAX483 DI|<----- TXD
ESP32 BOARD | | RS-485 side | | SERIAL ADAPTER SIDE ESP32 BOARD | | RS-485 side | | SERIAL ADAPTER SIDE
RTS --+--->| DE | / \ | DE|---+ RTS --+--->| DE | / \ | DE|---+
| | A|---------------|A | | | | A|---------------|A | |