From c8c9a555ff65426629f49208a9ed1be17931501c Mon Sep 17 00:00:00 2001
From: Rastislav Vysoky <recrof@gmail.com>
Date: Sun, 26 Apr 2026 15:10:50 +0200
Subject: [PATCH] added support for rak6421 with rak13300x radios

---
 README.md           | 20 +++++++++++++++-----
 radio-settings.json | 46 +++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 59 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index fc174cd..a3c2852 100644
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ Frequency Labs meshadv
     GPIO Pins: CS=21, Reset=18, Busy=20, IRQ=16, TXEN=13, RXEN=12, use_dio3_tcxo=True
 
 HT-RA62 module
-    
+
     Hardware: Heltec HT-RA62 LoRa module
     Platform: Raspberry Pi (or compatible single-board computer)
     Frequency: 868MHz (EU) or 915MHz (US)
@@ -92,7 +92,7 @@ HT-RA62 module
     SPI Bus: SPI0
     GPIO Pins: CS=21, Reset=18, Busy=20, IRQ=16, use_dio3_tcxo=True, use_dio2_rf=True
 
-Zindello Industries UltraPeater 
+Zindello Industries UltraPeater
 
     Hardware: EBYTE E22/P 1W Module
     Platform: Luckfox Pico Ultra/W  (NOT A PI DEVICE)
@@ -113,6 +113,16 @@ Waveshare LoRaWAN/GNSS HAT (SPI Version Only)
     GPIO Pins: CS=21, Reset=18, Busy=20, IRQ=16
     Note: Only the SPI version is supported. The UART version will not work.
 
+RAK Wireless RAK6421 with RAK1330x
+
+    Hardware: RAK1330x LoRa module
+    Platform: Raspberry Pi (or compatible single-board computer)
+    Frequency: 868MHz (EU) or 915MHz (US)
+    TX Power: 22dBm on RAK13300, 30dBm on RAK13302
+    SPI Bus: SPI0
+    GPIO Pins(IO Slot 1): Reset=16, Busy=24, IRQ=22, use_dio3_tcxo=True, use_dio2_rf=True
+    GPIO Pins(IO Slot 2): Reset=24, Busy=19, IRQ=18, use_dio3_tcxo=True, use_dio2_rf=True
+
 ...
 
 ## Screenshots
@@ -131,7 +141,7 @@ Before You Begin
 
 Make sure SPI is switched on using raspi-config:
 
-```bash 
+```bash
 sudo raspi-config
 ```
 
@@ -145,12 +155,12 @@ sudo reboot
 ```
 
 After reboot, you can confirm SPI is active:
-```bash 
+```bash
 ls /dev/spi*
 ```
 
 You should see something like:
-```bash 
+```bash
 /dev/spidev0.0  /dev/spidev0.1
 ```
 
diff --git a/radio-settings.json b/radio-settings.json
index e3f74ad..9b0ae50 100644
--- a/radio-settings.json
+++ b/radio-settings.json
@@ -206,7 +206,7 @@
       "preamble_length": 17,
       "is_waveshare": false
     },
-      "ultrapeater-e22": {
+    "ultrapeater-e22": {
       "name": "Zindello Industries UltraPeater E22",
       "bus_id": 0,
       "cs_id": 0,
@@ -225,7 +225,7 @@
       "use_gpiod_backend": true,
       "gpio_chip": 1
     },
-      "ultrapeater-e22p": {
+    "ultrapeater-e22p": {
       "name": "Zindello Industries UltraPeater E22P",
       "bus_id": 0,
       "cs_id": 0,
@@ -244,6 +244,48 @@
       "preamble_length": 17,
       "use_gpiod_backend": true,
       "gpio_chip": 1
+    },
+    "rak6421-13300x-slot1": {
+      "name": "Rak Wireless RAK6421 with RAK1330x on IO Slot 1",
+      "bus_id": 0,
+      "cs_id": 0,
+      "cs_pin": -1,
+      "reset_pin": 16,
+      "busy_pin": 24,
+      "irq_pin": 22,
+      "txen_pin": -1,
+      "rxen_pin": -1,
+      "en_pins": [12, 13],
+      "txled_pin": -1,
+      "rxled_pin": -1,
+      "tx_power": 22,
+      "use_dio2_rf": true,
+      "use_dio3_tcxo": true,
+      "dio3_tcxo_voltage": 1.8,
+      "preamble_length": 17,
+      "use_gpiod_backend": true,
+      "gpio_chip": 1
+    },
+    "rak6421-13300x-slot2": {
+      "name": "Rak Wireless RAK6421 with RAK1330x on IO Slot 2",
+      "bus_id": 0,
+      "cs_id": 1,
+      "cs_pin": -1,
+      "reset_pin": 24,
+      "busy_pin": 19,
+      "irq_pin": 18,
+      "txen_pin": -1,
+      "rxen_pin": -1,
+      "en_pins": [26, 23],
+      "txled_pin": -1,
+      "rxled_pin": -1,
+      "tx_power": 22,
+      "use_dio2_rf": true,
+      "use_dio3_tcxo": true,
+      "dio3_tcxo_voltage": 1.8,
+      "preamble_length": 17,
+      "use_gpiod_backend": true,
+      "gpio_chip": 1
     }
   }
 }