diff --git a/code/b-parasite/config/prst_config.h b/code/b-parasite/config/prst_config.h
index ad8b241..49b405e 100644
--- a/code/b-parasite/config/prst_config.h
+++ b/code/b-parasite/config/prst_config.h
@@ -2,7 +2,6 @@
 #define _PRST_CONFIG_H_
 
 #include "nrf_gpio.h"
-
 // Some configurations are version-specific. Uncomment the line corresponding
 // the the version you're programming. The version can be found on the
 // b-parasite board.
@@ -51,6 +50,11 @@
 #define PRST_BLE_ADV_INTERVAL_IN_MS 30
 // Possible values are ..., -8, -4, 0, 4, 8.
 #define PRST_BLE_ADV_TX_POWER 8
+// Experimental support for "long range" BLE, introduced in Bluetooth 5. It uses
+// a different type of physical layer - the Coded PHY. Receivers should also
+// scan using Coded PHY in order to find this device when operating in this
+// mode.
+#define PRST_BLE_EXPERIMENTAL_LONG_RANGE 0
 
 // PWM.
 #define PRST_PWM_PIN NRF_GPIO_PIN_MAP(0, 5)
diff --git a/code/b-parasite/src/prst/ble.c b/code/b-parasite/src/prst/ble.c
index d4d8cde..3ac15cf 100644
--- a/code/b-parasite/src/prst/ble.c
+++ b/code/b-parasite/src/prst/ble.c
@@ -72,7 +72,11 @@ static ble_advdata_service_data_t advdata_service_data_ = {
 // Warning: do not update this while advertising.
 static ble_advdata_t adv_data_ = {
     .name_type = BLE_ADVDATA_FULL_NAME,
+#if PRST_BLE_EXPERIMENTAL_LONG_RANGE
+    .flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE,
+#else
     .flags = BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED,
+#endif
     .p_service_data_array = &advdata_service_data_,
     .service_data_count = 1,
 };
@@ -91,10 +95,16 @@ static ble_gap_addr_t gap_addr_ = {.addr_type =
 static void init_advertisement_data() {
   // We'll just broadcast our data, so we disallow connections and scan
   // requests.
+#if PRST_BLE_EXPERIMENTAL_LONG_RANGE
+  adv_params_.properties.type =
+      BLE_GAP_ADV_TYPE_EXTENDED_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;
+  adv_params_.primary_phy = BLE_GAP_PHY_CODED;
+  adv_params_.secondary_phy = BLE_GAP_PHY_CODED;
+#else
   adv_params_.properties.type =
       BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED;
+#endif
 
-  // No particular peer - undirected advertisement.
   adv_params_.p_peer_addr = NULL;
   adv_params_.filter_policy = BLE_GAP_ADV_FP_ANY;
   adv_params_.interval = NON_CONNECTABLE_ADV_INTERVAL;