* Refactor: removed duplicated radio_rng_seed(), radio_set_params(), radio_set_tx_power()

src/helpers/esp32/ESPNOWRadio.cpp

@@ -54,6 +54,10 @@ void ESPNOWRadio::init() {
   }
 }
 
+uint32_t ESPNOWRadio::getRngSeed() {
+  return millis() + intID();  // TODO: where to get some entropy?
+}
+
 void ESPNOWRadio::setTxPower(uint8_t dbm) {
   esp_wifi_set_max_tx_power(dbm * 4);
 }

src/helpers/esp32/ESPNOWRadio.h

@@ -9,6 +9,13 @@ protected:
 public:
   ESPNOWRadio() { n_recv = n_sent = n_recv_errors = 0; }
 
+  uint32_t getRngSeed();
+
+  void setParams(float freq, float bw, uint8_t sf, uint8_t cr) {
+    // no-op
+  }
+  void powerOff() { /* no-op */ }
+
   void init();
   int recvRaw(uint8_t* bytes, int sz) override;
   uint32_t getEstAirtimeFor(int len_bytes) override;