diff --git a/test/lora32/main/main.c b/test/lora32/main/main.c
index 31893df..20fbf27 100644
--- a/test/lora32/main/main.c
+++ b/test/lora32/main/main.c
@@ -125,6 +125,14 @@ void send(void *args) {
   lora32_send(&lora, (uint8_t *)args, 12);
 };
 
+void set_spreadfactor(void *args) {
+  uint32_t sf = atoi(args);
+
+  ESP_LOGI(TAG, "spreadfactor: %d", sf);
+
+  lora32_set_spreadfactor(&lora, sf);
+}
+
 void app_main() {
   esp_err_t ret;
 
@@ -149,6 +157,7 @@ void app_main() {
   ucmdr_init();
   ucmdr_install("send", send);
   ucmdr_install("dump", dump_mem);
+  ucmdr_install("sf", set_spreadfactor);
 
   uart_config_t uart_config = {
     .baud_rate = 115200,