I have a UNO and use a MAX232 to convert from TTL to RS232 to connect to my transmitter (ham radio). I have a Leonardo on order and looking at the serial information for the Leonardo it refers to RS232; Does this mean that the Leonardo has a built-in level converter so that I can connect directly into a RS232 environment?
No RS232 levels on Leonardo board, 'Vcc level' UART only + CDC 'serial through USB'
You'll had to use MAX232 or equivalent to join your transmitter like you did before with UNO.
I have a Leonardo on order and looking at the serial information for the Leonardo it refers to RS232;
If that's the case then the information is wrong. People typically use the term "RS232" to mean "serial" or "UART", technically there is no connection between the terms.
Which information are you referring to, can you post a link?
Rob
The following is the fourth paragraph in the main Arduino on-line refence manual under the link to serial. You can see why I thought that the Leonardo was RS232 and I could avoid a MAX232.
The Arduino Leonardo board uses Serial1 to communicate via RS232 on pins 0 (RX) and 1 (TX). Serial is reserved for USB CDC communication. For more information, refer to the Leonardo getting started page and hardware page.
Yes I see that, it's fairly common terminology but it's wrong and has caused confusion in this case.
Rob