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# modbus_close
## Name
modbus_close - close a Modbus connection
## Synopsis
```c
void modbus_close(modbus_t *ctx);
```
## Description
The *modbus_close()* function shall close the connection established with the
backend set in the context.
## Return value
There is no return value.
## Example
```c
modbus_t *ctx;
ctx = modbus_new_tcp("127.0.0.1", 502);
if (modbus_connect(ctx) == -1) {
fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno));
modbus_free(ctx);
return -1;
}
modbus_close(ctx);
modbus_free(ctx);
```
## See also
- [modbus_connect](modbus_connect.md)
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