Hello,
Hardware Setup:
- nRF7002Ek - Serving as a Wi-Fi Chip.
- nRF52840DK - Serving as Host Controller.
- MOSI - p45
- MISO - p46
- SCK - p47
- CS - p44
- Power Supply - Powered via USB.
Software Setup:
- Development Environment: Visual Studio.
- Framework: mbed
Issue Description: I'm facing an issue with Wi-Fi connectivity with nRF7002 and nRF52840. I am using mbed framework and visual studio.When I attempt to connect with WI-Fi using SPI communication protocol. I consistently receive failed to connect. I am trying with following code.
#include "mbed.h"
#include <PinNames.h>
// SPI setup for nRF7002
SPI spi(p45, p46, p47); // MOSI, MISO, SCK
DigitalOut cs(p44); // Chip Select
// Serial interface for debugging
BufferedSerial pc(p6, p8);
// WiFi credentials
const char* ssid = "###";
const char* password = "####";
#define SUCCESS_CODE 0x10
#define FAILURE_CODE 0xFF
// Initialize nRF7002
void init_nrf7002() {
cs = 1; // Set CS high
ThisThread::sleep_for(100ms);
cs = 0;
pc.write("Sending CIPHER INIT command...\r\n", strlen("Sending CIPHER INIT command...\r\n"));
spi.write(0x4F); // CIPHER INIT command
ThisThread::sleep_for(100ms); // Delay for initialization
cs = 1;
}
// Send a string via SPI to nRF7002
void send_string(SPI& spi, const char* str) {
while (*str) {
spi.write(*str++);
}
}
// Read a specific status register
uint8_t read_status_register(uint8_t command) {
cs = 0;
spi.write(command); // Send the command
ThisThread::sleep_for(10ms);
uint8_t status = spi.write(0x00);
cs = 1;
return status;
}
// Debugging function to print status registers
void debug_status() {
uint8_t status0 = read_status_register(0x05); // RDSR
uint8_t status1 = read_status_register(0x1F); // RDSR1
uint8_t status2 = read_status_register(0x2F); // RDSR2
char buffer[100];
sprintf(buffer, "Status0: 0x%02X, Status1: 0x%02X, Status2: 0x%02X\r\n", status0, status1, status2);
pc.write(buffer, strlen(buffer));
}
// Connect to WiFi using nRF7002
void connect_to_wifi() {
cs = 0;
pc.write("Sending WiFi connection command...\r\n", strlen("Sending WiFi connection command...\r\n"));
spi.write(0x01); // Command for WiFi connection (verify this command)
ThisThread::sleep_for(100ms); // Delay for command processing
send_string(spi, ssid);
send_string(spi, password);
cs = 1;
pc.write("Attempting to connect to WiFi...\r\n", strlen("Attempting to connect to WiFi...\r\n"));
// Wait and check for connection status
ThisThread::sleep_for(20000ms); // Increased delay for module response
debug_status();
uint8_t status = read_status_register(0x05); // RDSR
if (status == SUCCESS_CODE) {
pc.write("Connected to WiFi\r\n", strlen("Connected to WiFi\r\n"));
} else {
pc.write("Failed to connect to WiFi\r\n", strlen("Failed to connect to WiFi\r\n"));
}
}
int main() {
pc.set_baud(115200);
spi.format(8, 0); // 8-bit data, Mode 0 (if Mode 0 is required)
spi.frequency(1000000); // 1 MHz
init_nrf7002();
connect_to_wifi();
while (true) {
ThisThread::sleep_for(5000ms);
}
}
Here is the OUTPUT:
Sending CIPHER INIT command...
Sending WiFi connection command...
Attempting to connect to WiFi...
Status0: 0x00, Status1: 0x00, Status2: 0x00
Failed to connect to Wi-Fi
Any inputs on how can I get my nRF7002 to so anything on the network? I am new to this so I might be making some basic mistake.
Best Regards,
Sana Mulla
