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+--- Thread: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code (/showthread.php?tid=1867)
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[Arduino IDE demo source code for KC868-A6]--#09-RS485_code - KinCony Support - 04-25-2022
[Arduino IDE demo source code for KC868-A6]--#09-RS485_code
Code:
void setup(){
Serial2.begin(9600);
}
void loop() {
Serial2.println("KinCony");
}
9.RS485.zip (Size: 469.3 KB / Downloads: 422)
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - Alpha - 02-15-2023
Hello,
I've looked at the A6 schematic and it doesn't seem the DE/RE pins of the RS485 chip ( MAX13487E) are connected to the ESP32.
Does this mean the A6 can only transmit RS485, or am I missing something obvious?
Thanks in advance,
alex
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - admin - 02-16-2023
DE/RE not need to use, MAX13487 will auto control the signal direction. for ESP32 just use RXD,TXD pins is ok.
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - Alpha - 02-16-2023
(02-16-2023, 12:13 AM)admin Wrote: DE/RE not need to use, MAX13487 will auto control the signal direction. for ESP32 just use RXD,TXD pins is ok.
Hello, thanks for the quick reply!
I had a quick look at the MAX13487 datasheet and assumed it was the same as all the other 485 chips I have used. Wrong!
Thanks again!
Cheers,
alex
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - admin - 02-16-2023
DE/RE pin just connect together with 10k resistance to Vcc is ok.
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - Alpha - 02-16-2023
(02-16-2023, 01:31 AM)admin Wrote: DE/RE pin just connect together with 10k resistance to Vcc is ok.
Hmm, I still don't seem to be getting any data out of the RS485 port. I have it connected to a known working RS458 to USB on my computer, and I'm not seeing any data on my serial terminal (all set for 9600, 8N1).
What board definition should I be using in the Arduino IDE? I'm currently using 'ESP Dev Module'. I'm wondering if Serial2 is using the correct TX and RX pins for this board.
Thanks again!
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - admin - 02-16-2023
do you have define the Serial2 pin in your arduino config fle firstly?
this is RS485 pin define for KC868-A6
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - Alpha - 02-16-2023
(02-16-2023, 03:46 AM)admin Wrote: do you have define the Serial2 pin in your arduino config fle firstly?
this is RS485 pin define for KC868-A6
Ah! Ok. I made that change and my Modbus read is now working! Excellent, thankyou very much.
Did I miss some documentation / wiki that tells me to change the RX2 and TX2 pins? Is there other defines that I should be changing?
Thanks again, I'm really enjoying working with this board. It's a really nice layout.
Cheers,
alex
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - admin - 02-16-2023
ok, only serial port and IIC bus SDA and SCL pins need set by arduino config file firstly.
RE: [Arduino IDE demo source code for KC868-A6]--#09-RS485_code - alexandre bassi - 08-18-2024
The RS485 code you posted is empty, the compressed file contains an empty .ino