VMA 205 espcomm_upload_mem failed

Arduino(TM) Shields
1

Hi,

I’m having difficulties with setting up VMA 205 WiFi ESP-WROOM-02 SHIELD. I have connected everything as mentioned in User manual but when I’m trying to flash example code I get following error message:

warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

Everything is connected like this:

IMG_20190310_111534
IMG_20190310_1115341758×1204 789 KB

Can somebody please help me resolve this issue? I’ve tried some tips from this topic: VMA101 with a VMA205 - warning: espcomm_sync failed - Arduino(TM) Shields - Whadda forum - Community Help and Support but I am not willing to spend more money for VMA 440 specially because VMA 205 should be plug and play…

2

Here are the options from Arduino IDE:

Untitled
Untitled366×647 15.7 KB

3

Take a look here:

The way Velleman advertises it does not work.

4

I tried tips from mentioned post but without VMA 440 - So I need to have VMA 440 in order to use VMA 250? Is there any other solution besides VMA 440?

6

Dear,

Here below you’ll find the working demo code for the VMA205 “ESP8266 shield”.

For successfull uploading the code with IDE (and this when VMA205 are connected to Arduino board or VMA100 without VMA440), you"ll need to put dipswitch 1 to ON and dipswitch 2 to OFF position while uploading. When Uploading is done, put dipswitch 2 back in OFF positon. (SW1 = ON / SW2 = ON).

This is not correct in manual, this will as soon as possible corrected.

Regards,
Velleman support

Demo code:

/* This example set your ESP8266 module as a WiFi Station and create a WiFi AP, 
 * then other PC could conect into this WiFi and send internet data .
 */

char OK[2]="";

//////////////////////////////////////////////////////////////////////////
void OK_config()
{  
 while(1)
  {
   OK[0]=Serial.read();
   if(OK[0]=='O')
     {
      OK[1]=Serial.read();
      if(OK[1]=='K')
        {
        break;
        }
     }
   delay(20);
   }  
}
//////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////
void esp8266_config()
{
  delay(500);
 // Serial.println("AT+RST");   
 // OK_config();  
  Serial.println("AT+CWMODE_DEF=3");   //Set Wi-Fi mode to 3(SoftAP+Station mode)
  OK_config();
  Serial.println("AT+CWSAP=\"VMAWIFI\",\"123456789\",11,2");//Set WIFI ID and password
  OK_config();
  Serial.println("AT+CIPMUX=1");          
  OK_config();
  Serial.println("AT+CIPSERVER=1");    //Set TCP Server
  OK_config();
  digitalWrite(A3,HIGH);
  OK_config();                          //Wating Client send "OK" to confirm 
  digitalWrite(A3,LOW);
}
///////////////////////////////////////////////////////////////////////
void setup() 
{ 
  Serial.begin(115200);
  pinMode(A3,OUTPUT);
  esp8266_config();
}
void loop()
{
 Serial.println("AT+CIPSEND=0,9"); 
 OK_config();
 Serial.println("arduino"); 
 delay(1500);
}