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AT+i Programmer's Manual - SE Spezial-Electronic AG

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Notes:<br />

E-mail Send Commands<br />

I/OK If is within limits and after bytes have been received<br />

successfully.<br />

I/ERROR If is out of bounds, or if a communication error occurred<br />

during the Internet session.<br />

If is larger than 256 bytes, iChip assumes host flow control. Depending on the<br />

setting of the FLW parameter, the flow control mode is either software or hardware.<br />

Under software flow control, the host processor must respond to iChip‘s flow control<br />

characters. The software flow control protocol is detailed in the Host iChip<br />

Software Flow Control section later in this document. When software flow control is<br />

active, it is recommended to set the iChip to Echo-Off mode. Under hardware flow<br />

control, the ~CTS/~RTS RS232 control signals must be connected and the host must<br />

respond to the iChip‘s ~CTS signal. The host may send data only when the ~CTS<br />

signal is asserted (active low). If a transmission error occurs while in hardware flow<br />

control, iChip continues receiving all remaining bytes before returning the<br />

I/ERROR response.<br />

Some SMTP servers limit e-mail message size to a value that is lower than iChip‘s<br />

limitations.<br />

<strong>AT+i</strong> Programmer‘s <strong>Manual</strong> Version 8.21 6-3

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