WiFi 5 click

WiFi 5 click features Gainspan’s GS1500M 802.11b/g/n Low Power Wi-Fi module with a PCB trace antenna (external IPX antenna connector also available). The click is designed to run on a 3.3V power supply. WiFi 5 click communicates with the target MCU over a UART interface with additional functionality provided by RST and PROG pins (the latter in place of default mikroBUS™ AN pin). 

GS1500M WiFi module

The module supports WiFi PHY rates up to 72.2 Mbps and is fully compliant with 802.11b/g/n and meets worldwide regulatory requirements. GS1500M also provides support for a peer-to-peer networkingcapabilities allowing WiFi devices to connect to one another without an access point, enabling easy transfer of content.

Security features include support for WEP/WPA/WPA2, Adhoc and WPS (Wi-Fi protected setup).

On the hardware side, the GS1500M module comprises two ARM7 44MHz chips (one for the radio, the other for applications), as well as on-chip Flash and SRAM.

Data rates of up to 921.6kbps can be achieved through the UART interface.

Low power consumption

The module can stay in standby mode (7μA) most of the time and only wake up when data transmitting is needed. While in sleep mode it uses only 8mA.

WiFi 5 click is suited for battery powered applications, due to its multiple power modes (stand-by, sleep, deep sleep).

Key features

• GS1500M WiFi module
  • Highly integrated 802.11b/g/n Wi-Fi radio
  • Supports peer-to-peer networking
  • RF Output Power (Typical) 14 dBm (802.11b), 12dBm (802.11n)
  • Networking Protocols: UDP, TCP/IP (IPv4), DHCP, ARP, DNS, SSL, HTTP/HTTPS Client and Server
• Interface: UART
• 3.3V power supply

Specification

Pinout diagram

This table shows how the pinout on WiFi 5 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin	mikroBUStm				Pin	Notes
Enables the programming of GS1500M onboard flash	PROG	1	AN	PWM	16	NC	Not connected
Reset	RST	2	RST	INT	15	NC	Not connected
Not connected	NC	3	CS	TX	14	TX	UART transmit
Not connected	NC	4	SCK	RX	13	RX	UART receive
Not connected	NC	5	MISO	SCL	12	NC	Not connected
Not connected	NC	6	MOSI	SDA	11	NC	Not connected
Power supply	+3.3V	7	3.3V	5V	10	NC	Not connected
Ground	GND	8	GND	GND	9	GND	Ground

Programming

This snippet demonstrates WiFi5 click connecting to a local network (mikroe public) and fetches weather data from a web site.

 1 void main()
 2 {
 3      // initialize the UART for monitoring the program
 4      UART1_Init_Advanced( 9600,  _UART_8_BIT_DATA,
 5                                   _UART_NOPARITY,
 6                                  _UART_ONE_STOPBIT,
 7                                  &_GPIO_MODULE_USART1_PA9_10 );
 8      Delay_ms(300);
 9      UART1_Write_Text("Uart initializedrn");
10 
11      Delay_ms(5000);
12      // initialize the UART for communication between the MCU and the WiFi 5 Click
13      UART3_Init_Advanced( 9600, _UART_8_BIT_DATA,
14                                 _UART_NOPARITY,
15                                 _UART_ONE_STOPBIT,
16                                 &_GPIO_MODULE_USART3_PD89);
17 
18      Delay_ms(5000);
19 
20 
21      UART1_Write_Text("Uarts readyrn");
22 
23      Delay_ms(1000);
24 
25      // set up the UART interrupt
26      RXNEIE_USART3_CR1_bit = 1;
27      NVIC_IntEnable( IVT_INT_USART3 );
28      EnableInterrupts();
29      
30      // clear the buffer and the flags, setting them ready for the program to start
31      clear_serial_buffer();
32      flags_false();
33      UART3_WRITE_TEXT("AT+WPAPSK=MikroE Public,mikroe.guestrn");  // compute the PSK from SSID and PassPhrase
34      while(response_finished == false);                             // wait for the "OK" response
35 
36      UART1_WRITE_TEXT(serial_buffer);                               // print out the response  
37 
38      clear_serial_buffer();                                         // clear the buffer and flags  
39      flags_false();
40      Delay_ms(300);
41      UART3_WRITE_TEXT("AT+WA=MikroE Publicrn");                   // try to connect to MikroE Public network  
42      while (response_finished == false);                            // wait for the "OK" response  
43 
44      UART1_WRITE_TEXT(serial_buffer);                               // Print out the response
45 
46      clear_serial_buffer();                                         // clear the buffer and flags
47      flags_false();
48      UART3_WRITE_TEXT("at+httpopen=api.openweathermap.orgrn");    // open the api.openweathermap.org web page
49      while (response_finished == false);                            // wait for the "OK" response
50 
51      UART1_WRITE_TEXT(serial_buffer);                               // print out the buffer
52 
53      clear_serial_buffer();                                         // clear the buffer and the flags
54      flags_false();

Code examples that demonstrate the usage of WiFi 5 click with MikroElektronika hardware, written for mikroC for FT90x and ARM are available on Libstock.

Downloads

 mikroBUS™ Standard specification 

 WiFi 5 click Examples 

 GS1500M datasheet

 WiFi 5 click Schematic

 WiFi 5 click Learn Article