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Check your application component speed,Databits (9600 N81)<br />
Probably you are not sending only 'ATZ' &amp;&nbsp;CR..<br />
You check your code &amp;&nbsp;port setting..<br />

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Check your application component speed,Databits (9600 N81)
Probably you are not sending only 'ATZ' & CR..
You check your code & port setting..


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I'm not only sending &quot;ATZ\r&quot; but &quot;+++&quot; before in order to obtain the command mode.<br />
Maybe is the fact that when I'm already in command mode and sending &quot;+++&quot; that causes ERROR <br />
How can I test that I'm in command mode ? Sending AT ?<br />
I will check these points...<br />
<br />
<br />
Thanks.
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I'm not only sending "ATZ\r" but "+++" before in order to obtain the command mode.
Maybe is the fact that when I'm already in command mode and sending "+++" that causes ERROR
How can I test that I'm in command mode ? Sending AT ?
I will check these points...


Thanks.

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<div class="content wysiwyg-content">
I am creating an application in C language and I faced with a problem of modem. When I need to init the modem (with &quot;ATZ\r&quot; string) while the application is running, I get an ERROR answer from the modem if it answered BUSY the last time. But, when I launch the application and send the &quot;ATZ\r&quot; the first time, all is well.<br />
I'm a beginner with communications with modem, so the error may be quite simple.<br />
<br />
Thank you.
</div>
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I am creating an application in C language and I faced with a problem of modem. When I need to init the modem (with "ATZ\r" string) while the application is running, I get an ERROR answer from the modem if it answered BUSY the last time. But, when I launch the application and send the "ATZ\r" the first time, all is well.
I'm a beginner with communications with modem, so the error may be quite simple.

Thank you.

Modem answers ERROR after an ATZ request

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.