Only one uart is supported in WiFiMCU so far. The GPIO pin is D8(RX1), D9(TX1).
| Function | Definition |
|---|---|
| uart.setup() | Setup uart parameters: buadrate, databits, parity, stopbits. |
| uart.on() | Register the callback functions for uart events |
| uart.send() | Send data via uart |
Description
Setup uart parameters: buadrate, databits, parity, stopbits.
Syntax
uart.setup(id, baud, parity, databits, stopbits)
Parameters
id: uart ID, always 1 at present.
baud: baudrate, such as: 4800, 9600, 115200.
parity: 'n': no parity, 'o': odd parity, 'e': even parity.
databits: data bits, '5', '6', '7', '8', '9'.
stopbits: stop bits, '1', '2'
Returns
nil
Examples
-uart.setup(1,9600,'n','8','1')
Description
Register the callback functions for uart events.
Syntax
uart.on(id, event ,func_cb)
Parameters
id: uart ID, always 1 at present.
event: always "data".
func_cb: Callback function for the event. When data arrived, the function will be called. Function prototype is: func_cb(data). “data” is the data received.
Returns
nil
Examples
-uart.on(1, 'data',function(t) len=string.len(t) print(len.." "..t) uart.send(1,t) end)
Description
Send data via uart.
Syntax
uart.send(1, string1,[number],...[stringn])
Parameters
id: uart ID, always 1 at present.
string1: string ready to send.
[number]: Optional, number ready to send.
[stringn]: Optional, The nth string ready to be send.
Returns
nil
Examples
-uart.send(1,'hello wifimcu')
-uart.send(1,'hello wifimcu','hi',string.char(0x32,0x35))
-uart.send(1,string.char(0x01,0x02,0x03))