Hye everyone here is my HC05 i already use 5V with GND to my HC05 However it seems like i don't have " PIN PAIRING " and if i pair with my phone with HC05 I can't control it in any apps that i download in playstore Screenshot_20241023-234709|225x500 [17296985980482593805023804554266]

If your phone pairs with the HC-05, the HC-05 works, and probably has a good baud rate. Verify your app baud rate. If you use a sketch to communicate with the HC-05, verify the sketch baud rate is correct.

The HC-05 is a 3.3V device. Logic level shifters are required to use it with a 5V Arduino. See these tutorials: https://www.martyncurrey.com/tag/hc-05/

[image] shafa-11: here is my HC05 Well, yes, there is your HC-05..... I submit that "isn't working well" is a complete understatement. It shouldn't be working at all. There is no serial connection to Arduino. All you have is power. Note that a successful pairing guarantees you nothing but th…

@shafa-11 Check that you have connected your HC-05 with Arduino UNO as per following daigram (Fig-1): [hc05-UNO] Figure-1:

[image] shafa-11: However it seems like i don't have " PIN PAIRING " I took this to mean that in the phone bluetooth settings when he sees the HC05 as an available device the next screen for a blutetooth pairing request does not come up with the "Enter PIN to pair with the xxxxx(Try 0000 or 1…

[image] cattledog: (Try 0000 or 1234) I have one BT that uses 123456... I thought it was broken for two years.

[image] xfpd: 123456 Probably a BLE device. HC-0x use four characters

yes and not to mention that i can't enter the AT+PSWD command

do i need to use resistor ? since the video that i watch in youtube didn't use any of that

Fig-1 of post #5 is a tested circuit. HC-05 is a 3.3V device. Vcc = 5V is dropped to 3.3V by an onboard voltage regulator. 3.3V-TX signal of HC-05 is well recognized by UNO as HIGH. 5V-TX signal of UNO must be dropped down to 3.3V signal by the shown resistor network before it is applied to RX-line…

My hc05 isn't working well

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anon85221860 November 2, 2024, 4:25pm 15

My hc-05 isn't working - Projects Discussion and Showcase / Home Automation - Arduino Forum

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My hc05 isn't working well

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