diff --git a/test/test_radio/test_main.cpp b/test/test_radio/test_main.cpp
new file mode 100644
index 000000000..fbe2b1b13
--- /dev/null
+++ b/test/test_radio/test_main.cpp
@@ -0,0 +1,100 @@
+#include "MeshRadio.h"
+#include "RadioInterface.h"
+#include "TestUtil.h"
+#include <unity.h>
+
+#include "meshtastic/config.pb.h"
+
+static void test_bwCodeToKHz_specialMappings()
+{
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 31.25f, bwCodeToKHz(31));
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 62.5f, bwCodeToKHz(62));
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 203.125f, bwCodeToKHz(200));
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 406.25f, bwCodeToKHz(400));
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 812.5f, bwCodeToKHz(800));
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 1625.0f, bwCodeToKHz(1600));
+}
+
+static void test_bwCodeToKHz_passthrough()
+{
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 125.0f, bwCodeToKHz(125));
+    TEST_ASSERT_FLOAT_WITHIN(0.0001f, 250.0f, bwCodeToKHz(250));
+}
+
+static void test_bootstrapLoRaConfigFromPreset_noopWhenUsePresetFalse()
+{
+    meshtastic_Config_LoRaConfig cfg = meshtastic_Config_LoRaConfig_init_zero;
+    cfg.use_preset = false;
+    cfg.region = meshtastic_Config_LoRaConfig_RegionCode_US;
+    cfg.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_FAST;
+    cfg.bandwidth = 123;
+    cfg.spread_factor = 8;
+
+    RadioInterface::bootstrapLoRaConfigFromPreset(cfg);
+
+    TEST_ASSERT_EQUAL_UINT16(123, cfg.bandwidth);
+    TEST_ASSERT_EQUAL_UINT32(8, cfg.spread_factor);
+    TEST_ASSERT_EQUAL(meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_FAST, cfg.modem_preset);
+}
+
+static void test_bootstrapLoRaConfigFromPreset_setsDerivedFields_nonWideRegion()
+{
+    meshtastic_Config_LoRaConfig cfg = meshtastic_Config_LoRaConfig_init_zero;
+    cfg.use_preset = true;
+    cfg.region = meshtastic_Config_LoRaConfig_RegionCode_US;
+    cfg.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_FAST;
+
+    RadioInterface::bootstrapLoRaConfigFromPreset(cfg);
+
+    TEST_ASSERT_EQUAL_UINT16(250, cfg.bandwidth);
+    TEST_ASSERT_EQUAL_UINT32(9, cfg.spread_factor);
+}
+
+static void test_bootstrapLoRaConfigFromPreset_setsDerivedFields_wideRegion()
+{
+    meshtastic_Config_LoRaConfig cfg = meshtastic_Config_LoRaConfig_init_zero;
+    cfg.use_preset = true;
+    cfg.region = meshtastic_Config_LoRaConfig_RegionCode_LORA_24;
+    cfg.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_FAST;
+
+    RadioInterface::bootstrapLoRaConfigFromPreset(cfg);
+
+    TEST_ASSERT_EQUAL_UINT16(800, cfg.bandwidth);
+    TEST_ASSERT_EQUAL_UINT32(9, cfg.spread_factor);
+}
+
+static void test_bootstrapLoRaConfigFromPreset_fallsBackIfBandwidthExceedsRegionSpan()
+{
+    meshtastic_Config_LoRaConfig cfg = meshtastic_Config_LoRaConfig_init_zero;
+    cfg.use_preset = true;
+    cfg.region = meshtastic_Config_LoRaConfig_RegionCode_EU_868;
+    cfg.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_SHORT_TURBO;
+
+    RadioInterface::bootstrapLoRaConfigFromPreset(cfg);
+
+    TEST_ASSERT_EQUAL(meshtastic_Config_LoRaConfig_ModemPreset_LONG_FAST, cfg.modem_preset);
+    TEST_ASSERT_EQUAL_UINT16(250, cfg.bandwidth);
+    TEST_ASSERT_EQUAL_UINT32(11, cfg.spread_factor);
+}
+
+void setUp(void) {}
+void tearDown(void) {}
+
+void setup()
+{
+    delay(10);
+    delay(2000);
+
+    initializeTestEnvironment();
+
+    UNITY_BEGIN();
+    RUN_TEST(test_bwCodeToKHz_specialMappings);
+    RUN_TEST(test_bwCodeToKHz_passthrough);
+    RUN_TEST(test_bootstrapLoRaConfigFromPreset_noopWhenUsePresetFalse);
+    RUN_TEST(test_bootstrapLoRaConfigFromPreset_setsDerivedFields_nonWideRegion);
+    RUN_TEST(test_bootstrapLoRaConfigFromPreset_setsDerivedFields_wideRegion);
+    RUN_TEST(test_bootstrapLoRaConfigFromPreset_fallsBackIfBandwidthExceedsRegionSpan);
+    exit(UNITY_END());
+}
+
+void loop() {}