From 54283ca7dd0c7a6251bc7a7b926245b01d0eb612 Mon Sep 17 00:00:00 2001
From: MultiMote <contact@mmote.ru>
Date: Mon, 4 May 2026 20:37:23 +0300
Subject: [PATCH] Fix Cap LoRa868 invalid initialization

---
 variants/m5stack_cardputer/M5CardputerBoard.h | 16 ++--------------
 variants/m5stack_cardputer/target.cpp         |  8 ++++++++
 variants/m5stack_cardputer/target.h           |  3 +++
 3 files changed, 13 insertions(+), 14 deletions(-)

diff --git a/variants/m5stack_cardputer/M5CardputerBoard.h b/variants/m5stack_cardputer/M5CardputerBoard.h
index 89bb152..6e9948c 100644
--- a/variants/m5stack_cardputer/M5CardputerBoard.h
+++ b/variants/m5stack_cardputer/M5CardputerBoard.h
@@ -11,15 +11,10 @@
 class M5CardputerBoard : public ESP32Board {
 public:
   void begin() {
-    // Step 1: Enable power to I/O expander on LoRa Cap (GPIO 46)
-    pinMode(46, OUTPUT);
-    digitalWrite(46, HIGH);
-    delay(100);  // Give I/O expander time to power up
-
-    // Step 2: Initialize main I2C (SDA=2, SCL=1) before M5Cardputer keyboard init
+    // Step 1: Initialize main I2C (SDA=2, SCL=1) before M5Cardputer keyboard init
     ESP32Board::begin();
 
-    // Step 3: Initialize M5Cardputer hardware with keyboard enabled
+    // Step 2: Initialize M5Cardputer hardware with keyboard enabled
     auto cfg = M5.config();
     cfg.clear_display = true;
     cfg.internal_imu = false;  // No IMU on Cardputer-Adv
@@ -30,13 +25,6 @@ class M5CardputerBoard : public ESP32Board {
     delay(100);
     M5Cardputer.Keyboard.begin();
 
-    M5.In_I2C.writeRegister8(0x43, 0x03, 0x00, 100000);  
-    delay(10);
-    M5.In_I2C.writeRegister8(0x43, 0x01, 0xFF, 100000);  
-    delay(200); 
-
-    Serial.println("LoRa Cap I/O expander (PI4IOE at 0x43 on SDA=8,SCL=9) configured");
-
     Serial.println("M5Stack Cardputer-Adv initialized");
     Serial.print("Battery voltage: ");
     Serial.print(getBattMilliVolts());
diff --git a/variants/m5stack_cardputer/target.cpp b/variants/m5stack_cardputer/target.cpp
index 86ec54a..97eeb08 100644
--- a/variants/m5stack_cardputer/target.cpp
+++ b/variants/m5stack_cardputer/target.cpp
@@ -2,6 +2,7 @@
 #include "target.h"
 
 M5CardputerBoard board;
+m5::PI4IOE5V6408_Class ioe(0x43, 400000, &m5::In_I2C);;
 
 static SPIClass spi;
 RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, spi, SPISettings());
@@ -189,6 +190,13 @@ SensorManager sensors;
 bool radio_init() {
   fallback_clock.begin();
   rtc_clock.begin(Wire);
+
+  if (ioe.begin()) {
+    Serial.printf("Using Cap LoRa-1262\n");
+    ioe.setDirection(0, true);      // Output
+    ioe.setHighImpedance(0, false); // Disable high-impedance so pin can actually drive
+    ioe.digitalWrite(0, true);      // High Level
+  }
   
   // Hardware reset sequence for LoRa module
   // This ensures proper initialization even if module is connected after power-on
diff --git a/variants/m5stack_cardputer/target.h b/variants/m5stack_cardputer/target.h
index 5884797..5951fd6 100644
--- a/variants/m5stack_cardputer/target.h
+++ b/variants/m5stack_cardputer/target.h
@@ -5,6 +5,7 @@
 #include <helpers/radiolib/RadioLibWrappers.h>
 #include <helpers/radiolib/CustomSX1262Wrapper.h>
 #include <M5CardputerBoard.h>
+#include <utility/PI4IOE5V6408_Class.hpp>
 #include <helpers/AutoDiscoverRTCClock.h>
 #include <helpers/SensorManager.h>
 #ifdef HAS_GPS
@@ -39,6 +40,8 @@ class CardputerSensorManager : public SensorManager {
 extern M5CardputerBoard board;
 extern WRAPPER_CLASS radio_driver;
 extern AutoDiscoverRTCClock rtc_clock;
+extern m5::PI4IOE5V6408_Class ioe;
+
 #ifdef HAS_GPS
 extern CardputerSensorManager sensors;
 #else