ESP-NOW Mac Address compile error

[chuck808]

Hello,

Trying to run the samples from https://randomnerdtutorials.com/esp-now ... duino-ide/ Getting Started with ESP-NOW (ESP32 with Arduino IDE), but keep running into compile error. The board I am using is the ESP-WROON-32 dev board.

If I run the sketches with

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1. // REPLACE WITH YOUR RECEIVER MAC Address
2. uint8_t broadcastAddress[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};

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, everything runs as expected.

However, if I replace the broadcast address with the Mac Address of the receiver

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1. // REPLACE WITH YOUR RECEIVER MAC Address
2. uint8_t broadcastAddress[] = {AC:67:B2:26:5D:78};

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, I get the following error message.

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1. Arduino: 1.8.13 (Windows 10),
2. Board: "ESP32 Dev Module,
3. Disabled,
4. Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS),
5. 240MHz (WiFi/BT),
6. QIO, 80MHz,
7. 4MB (32Mb),
8. 921600,
9. None"
10.  
11. sketch_feb14a:16:36: error: expected '}' before ':' token
12.  
13.  uint8_t broadcastAddress[] = {AC:67:B2:26:5D:78};                               ^
14.  
15. sketch_feb14a:16:36: error: name 'AC' used in a GNU-style designated initializer for an array
16.  
17. sketch_feb14a:16:36: error: expected ',' or ';' before ':' token
18.  
19. sketch_feb14a:16:48: error: expected declaration before '}' token
20.  
21.  uint8_t broadcastAddress[] = {AC:67:B2:26:5D:78};                                            ^
22.  
23. Multiple libraries were found for "WiFi.h"
24.  
25.  Used: C:\Users\name\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi
26.  
27.  Not used: C:\Program Files (x86)\Arduino\libraries\WiFi
28.  
29. exit status 1
30.  
31. expected '}' before ':' token

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I have read some posts that suggest removing one of the instances of "WiFI.h", but that doesn't fix the issue.

Any suggestions?

Thanks

[ChrisMCU]

Code: [Select all] [Expand/Collapse]

1. uint8_t broadcastAddress[] = {AC:67:B2:26:5D:78};

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should be:

Code: [Select all] [Expand/Collapse]

1. uint8_t broadcastAddress[] = {0xAC, 0x67, 0xB2, 0x26, 0x5D, 0x78};

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[lbernstone]

"AC" is a string. 0xAC is a uint8_t.

[chuck808]

Hello lbernstone,



What an idiot I am.

Thanks