Can't let two HM-10 always connect

Projects Programming
1

Hi all!
I use two UNO boards and two HM-10 Bluetooth so they can be interconnected, but when I power off and restart, they can't connect automatically. I also keyed "AT+CONNL", and it didn't return any message. :face_exhaling:
This is my serial port window:

image
image865×464 106 KB

These are my code:

#include <SoftwareSerial.h>
int HM10_TxD = 2; int HM10_RxD = 3;
SoftwareSerial BT(HM10_TxD, HM10_RxD);
char cB, cS;
void setup()
{
  Serial.begin(115200);
  BT.begin(115200);
}
void loop() {
  if (Serial.available()) {
    cB = Serial.read();
    BT.print(cB);
  }
  if (BT.available()) {
    cS = BT.read();
    Serial.print(cS);
  }
}

Please help me, thanks!

2

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