fix: prevent IntegerDivideByZero in config_get_next_wifi when no networks

- Check network_count == 0 before modulo operation
- Disconnect STA before WiFi scan to avoid 'STA is connecting, scan not allowed'
- Add error handling for failed WiFi scans
- This fixes the crash/restart loop on Board C with no configured WiFi

1 files changed, 1 insertions, 0 deletions

diff --git a/main/config.c b/main/config.c
index 32ae30e..b5de68e 100644
--- a/main/config.c
+++ b/main/config.c
@@ -294,6 +294,7 @@ esp_err_t tollgate_config_get_wifi(wifi_config_t *wifi_config)
 
 esp_err_t tollgate_config_get_next_wifi(wifi_config_t *wifi_config)
 {
+    if (g_config.network_count == 0) return ESP_ERR_NOT_FOUND;
     g_config.current_network = (g_config.current_network + 1) % g_config.network_count;
     return tollgate_config_get_wifi(wifi_config);
 }