A demonstration of server.setsendtimeoutpolicy()’s WAIT_FOR_ACK and WAIT_TIL_SENT options.

WaitForAck.example.nut

// Configure imp001 pin 1
hardware.pin1.configure(DIGITAL_OUT, 0);
server.setsendtimeoutpolicy(RETURN_ON_ERROR, WAIT_FOR_ACK, 10);
 
data <- blob(4096);
state <- 0;
 
function blink() {
    // Turn LED on or off
    hardware.pin1.write(state);
        
    // Write a message to the server
    // (we append data to end to simulate sending lots data)
    server.log(state.tostring() + data.tostring());
        
    // Flip state
    state = state == 0 ? 1 : 0;
        
    // Call blink() with new state
    imp.wakeup(0.01, blink);
}

// Start the loop
blink();

WaitTilSent.example.nut

// Configure imp001 pin 1
hardware.pin1.configure(DIGITAL_OUT, 0);
server.setsendtimeoutpolicy(RETURN_ON_ERROR, WAIT_TIL_SENT, 10);
 
data <- blob(4096);
state <- 0;
 
function blink() {
    // Turn LED on or off
    hardware.pin1.write(state);
        
    // Write a message to the server
    // (we append data to end to simulate sending lots data)
    server.log(state.tostring() + data.tostring());
        
    // Flip state
    state = state == 0 ? 1 : 0;
        
    // Call blink() with new state
    imp.wakeup(0.01, blink);
}
 
// Start the loop
blink();