From 6a43afb0199b1dadf0686fc5affd411fcc367207 Mon Sep 17 00:00:00 2001
From: GlassOnTin <GlassOnTin@users.noreply.github.com>
Date: Sun, 29 Mar 2026 15:39:04 +0100
Subject: [PATCH] Force radio restart on CMD_RADIO_STATE, debug LoRa RX failure
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CMD_RADIO_STATE 0x01 now does stopRadio() + startRadio() to ensure
clean SX1262 re-initialization when rnsd configures the radio.

LoRa bidirectional test: NEITHER device can receive from the other.
Both detect RF energy (airtime 1.34%) but can't demodulate packets.
This rules out IFAC, provisioning, and firmware issues — the problem
is at the LoRa PHY layer. Both SX1262 chips see preambles but fail
to decode the payload.

Next step: bare-metal LoRa test bypassing all RNS/IFAC/KISS layers.
Send a raw LoRa packet from one SX1262 and verify reception on the
other with minimal firmware to isolate the demodulation failure.
---
 RNode_Firmware.ino | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/RNode_Firmware.ino b/RNode_Firmware.ino
index 335f6a0..0bbd9da 100644
--- a/RNode_Firmware.ino
+++ b/RNode_Firmware.ino
@@ -1159,6 +1159,8 @@ void serial_callback(uint8_t sbyte, uint8_t ch) {
         stopRadio();
         kiss_indicate_radiostate();
       } else if (sbyte == 0x01) {
+        // Force full restart to ensure clean SX1262 init with current params
+        if (radio_online) stopRadio();
         startRadio();
         kiss_indicate_radiostate();
       }