Hardware serial monitor problem (possible defected unit)

Arduino
1

Hi,

I have a cactus micro rev2

When i run this sketch

String tmp; 

#define BAUD_RATE 9600

void setup() {
  Serial.begin(BAUD_RATE);
  Serial1.begin(BAUD_RATE); 
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  Serial.println("Hello Cactus Micro!");
  
  // Enable esp8266 
  pinMode(13, OUTPUT);
  digitalWrite(13, HIGH);  
};

void loop() {

  while (Serial1.available() > 0)  {
    tmp += char(Serial1.read());
    delay(2);
  }

  if(tmp.length() > 0) {
    Serial.println(tmp);
    tmp = "";
  }

  if (Serial.available()) {
    Serial1.write(Serial.read());
  }
}

this is what i get (and there is no reply to AT commands)

Hello Cactus Micro!
 ÕÁ‡ŠeäF<úaHœBCa‡;*a˜aۄDe@†

I have tried with different ai thinker firmwares but all the same
but I have tried a simple connection sketch using espduino firmware and it seems to work

Regards,

2

Please download the AT firmware first.

It’s ai thinker 0.9.5.2 and baud rate 9600.

3

Hi, thx for the reply

i have flashed ai-thinker 0.9.5.2-9600.bin file from the wiki or your link

this is the result

Hello Cactus Micro!
 Ýpa£¿xêäá쌍2|hpÁ

‡³u

No replies to any AT command avaliable
my arduino ide is 1.0.6 btw
using lilypad arduino usb as board and AVRISP mkII as programmer

4

could you please take a screenshot for Arduino IDE’s serial monitor?

5

Untitled.png614×699 5.95 KB

that garbage message changes everytime i reset the device

6

What reponse will be there if you send string AT+GMR ?

7

nothing

can i be flashing firmwares with the wrong settings?

i am using ESP8266Flasher.exe what should these settings be for mentioned firmwares?

baudrate
flashsize
flashspeed
SPI mode

8

The settings I used.

  • baud rate - default
  • flash size - 1M
  • flash speed - default
  • SPI mode - QIO
9

are they same for all firmwares?

btw i dont have default setting i have to select a baudrate or flash speed

10

[quote]i am using ESP8266Flasher.exe what should these settings be for mentioned firmwares?
[/quote]

you can also take a screenshot for the settings in ESP8266Flasher.exe

11

still not working

12

well i have changed flash size 1mbyte to 512kbyte with firmware 9.5.2–9600 and now i got this

Hello Cactus Micro!
@Ýp„aŒ£XáD™aoÊdxxh怚⏀
Ai-Thinker Technology Co. Ltd.

ready

AT+GMR

AT version:0.21.0.0
SDK version:0.9.5

OK

AT+CWLAP


ERROR

i am getting returns for AT commands but can not join ap, always returns ERROR
btw is not it strange how flash size effects firmware?

13

ok i have followed this and was able to connect

AT+CWMODE=1



OK

AT+RST


OK

`v¹”àÀÚBçü1Aš'[*“´‚Ð

˜
™H±´û
õ
Ai-Thinker Technology Co. Ltd.

ready

AT+CIPMUX=0


OK

AT+CIFSR

+CIFSR:STAIP,"0.0.0.0"
+CIFSR:STAMAC,"18:fe:34:f2:94:38"

OK

AT+CWJAP="ssid","1234567890"



OK

but still confused about flashing settings

14

the flash size is 512k if you bought Cactus Micro in old batch.

15

so does that mean i cant flash bigger firmwares than 512kb?

btw now i am having another problem with some sketches com port starts to disappear but i know this topic is solved

should i create another thread?

16

yes. Please start a new topic.

Thank you.