GS2101M IP2WiFi Adapter Command Reference Guide
1VV0301499
Rev. 2.0
33
2019-08-05
5. If Host MCU gets reset for some reason, then GS node (IP2WiFi Application) must be
explicitly reset using EXT_RESET pin and the Host MCU should wait for the host
wake-up signal to become high in case of SPI interface. However, if reset provision is
not available, then Host MCU must continuously send dummy ‘AT’ commands till
‘
\r\nOK\r\n
’ response is received from GS node (IP2WiFi Application).
3.1.2 Dual Interface Startup Handling
For proper synchronization between host micro controller (MCU) and IP2WiFi node, the
following steps must be followed:
1. UART interface which is the command interface acts as a control path to issue AT
commands and receive responses. Data interface is used for sending and receiving
data.
2. IP-to-WiFi Application sends
\r\nIP2Wifi\r\n
message through Command (UART)
interface to the host after power cycle, and sends
DataInterfaceReady\r\n
message
on Data interface.
3. Command (UART) interface does not accept any AT commands until the data
interface reads
DataInterfaceReady\r\n
message.
3.2 Interface
The embedded host uses one of the interfaces (UART/SPI/SDIO) to connect to the
IP-to-WiFi Application.
3.2.1 UART
3.2.1.1 UART Parameters
This command is used to set the UART parameters. The UART parameters take effect
immediately. However, they are stored in RAM and will be lost when power is lost unless
they are saved to a profile using AT&W (see
). The profile used
NOTE:
The SPI Host WAKE PIN for GS node is GPIO37.
NOTE:
1.)Since SDIO slave initialization is dependent on HOST SDIO Master, it is
mandatory to setup the Host’s SDIO which is the Master before GS node
boots-up. If not GS node keeps waiting until SDIO Master initializes.
2.)If GS node is kept waiting until the WATCHDOG timer expires, then it would
result in WATCHDOG Reset.
