examples: example with LoRa AT command set implementation

Signed-off-by: deadprogram <ron@hybridgroup.com>

examples/lora/atcmd/sim.go

@@ -0,0 +1,37 @@
+//go:build !featherwing && !gnse && !lorae5 && !nucleowl55jc
+
+package main
+
+// do simulator setup here
+func setupLora() (LoraRadio, error) {
+	return &SimLoraRadio{}, nil
+}
+
+type SimLoraRadio struct {
+}
+
+func (sr *SimLoraRadio) Reset() {
+}
+
+func (sr *SimLoraRadio) Tx(pkt []uint8, timeoutMs uint32) error {
+	return nil
+}
+
+func (sr *SimLoraRadio) Rx(timeoutMs uint32) ([]uint8, error) {
+	return nil, nil
+}
+
+func (sr *SimLoraRadio) SetFrequency(freq uint32)    {}
+func (sr *SimLoraRadio) SetIqMode(mode uint8)        {}
+func (sr *SimLoraRadio) SetCodingRate(cr uint8)      {}
+func (sr *SimLoraRadio) SetBandwidth(bw uint8)       {}
+func (sr *SimLoraRadio) SetCrc(enable bool)          {}
+func (sr *SimLoraRadio) SetSpreadingFactor(sf uint8) {}
+
+func firmwareVersion() string {
+	return "simulator " + currentVersion()
+}
+
+func lorarx() ([]byte, error) {
+	return nil, nil
+}