reza147
Member level 1
Hello
Problems with HC-05 bluetooth module.
When i turn on the module a led in hc-05 be blinking fast. This indicates that the module is in DATA mode. In this case, when I search the phone with Bluetooth, it correctly finds the Bluetooth module named HC-05.
When i hold Key_module (or connected EN_pin to VCC_pin) then conncted power to module, Now the led on the module will blink at the interval of 2 seconds. That means it has entered the AT mode?! (then i release Key_module or EN_pin)
But when i send "AT" command, module no respons. (i test with VCC=3.3v or 5v/ with 1200 to 230400 boud rate). Also I search the phone with Bluetooth,but not finds the Bluetooth module.
Having multiple bluetooth modules with the same name can be confusing. i attach pic of my module. Please tell if anyone can help .
Rx pin of the Bluetooth module to Tx pin of USB to TTL converter, and Tx pin of Bluetooth to Rx pin of converter. Also connect their ground to power_GND. (connect their Vcc to 3.3v or 5v)
Problems with HC-05 bluetooth module.
When i turn on the module a led in hc-05 be blinking fast. This indicates that the module is in DATA mode. In this case, when I search the phone with Bluetooth, it correctly finds the Bluetooth module named HC-05.
When i hold Key_module (or connected EN_pin to VCC_pin) then conncted power to module, Now the led on the module will blink at the interval of 2 seconds. That means it has entered the AT mode?! (then i release Key_module or EN_pin)
But when i send "AT" command, module no respons. (i test with VCC=3.3v or 5v/ with 1200 to 230400 boud rate). Also I search the phone with Bluetooth,but not finds the Bluetooth module.
Having multiple bluetooth modules with the same name can be confusing. i attach pic of my module. Please tell if anyone can help .
Rx pin of the Bluetooth module to Tx pin of USB to TTL converter, and Tx pin of Bluetooth to Rx pin of converter. Also connect their ground to power_GND. (connect their Vcc to 3.3v or 5v)