From 24edd3cf209b9a8362d103b535d2f18c7958ae56 Mon Sep 17 00:00:00 2001
From: Florent <florent@frizoncorrea.fr>
Date: Thu, 27 Nov 2025 22:55:21 +0100
Subject: [PATCH] thinknode_m5: add pca9557 expander

---
 variants/thinknode_m5/ThinknodeM5Board.cpp | 3 +--
 variants/thinknode_m5/platformio.ini       | 7 ++++---
 variants/thinknode_m5/target.cpp           | 6 ++++++
 variants/thinknode_m5/target.h             | 3 +++
 variants/thinknode_m5/variant.h            | 6 +++---
 5 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/variants/thinknode_m5/ThinknodeM5Board.cpp b/variants/thinknode_m5/ThinknodeM5Board.cpp
index 64744019..2aabb0e4 100644
--- a/variants/thinknode_m5/ThinknodeM5Board.cpp
+++ b/variants/thinknode_m5/ThinknodeM5Board.cpp
@@ -1,7 +1,6 @@
 #include "ThinknodeM5Board.h"
 
 
-
 void ThinknodeM5Board::begin() {
     pinMode(PIN_VEXT_EN, OUTPUT); 
     digitalWrite(PIN_VEXT_EN, !PIN_VEXT_EN_ACTIVE); // force power cycle
@@ -9,7 +8,7 @@ void ThinknodeM5Board::begin() {
     digitalWrite(PIN_VEXT_EN, PIN_VEXT_EN_ACTIVE); // turn backlight back on
     delay(120); // give display time to bias on cold boot
     ESP32Board::begin();
-    pinMode(PIN_STATUS_LED, OUTPUT); // init power led
+  //  pinMode(PIN_STATUS_LED, OUTPUT); // init power led
   }
 
   void ThinknodeM5Board::enterDeepSleep(uint32_t secs, int pin_wake_btn) {
diff --git a/variants/thinknode_m5/platformio.ini b/variants/thinknode_m5/platformio.ini
index 54ad8bd5..a78b1ba2 100644
--- a/variants/thinknode_m5/platformio.ini
+++ b/variants/thinknode_m5/platformio.ini
@@ -19,9 +19,9 @@ build_flags = ${esp32_base.build_flags}
   -D P_LORA_MISO=7
   -D P_LORA_MOSI=15
   -D PIN_USER_BTN=21
-  -D PIN_STATUS_LED=1
-  -D LED_STATE_ON=HIGH
-  -D PIN_LED=3
+#  -D PIN_STATUS_LED=1   ; leds are on PCA !!!
+#  -D LED_STATE_ON=HIGH
+#  -D PIN_LED=3
   -D DISPLAY_ROTATION=4
   -D DISPLAY_CLASS=GxEPDDisplay
   -D EINK_DISPLAY_MODEL=GxEPD2_154_D67
@@ -45,6 +45,7 @@ build_src_filter = ${esp32_base.build_src_filter}
 lib_deps = ${esp32_base.lib_deps}
   zinggjm/GxEPD2 @ 1.6.2
   bakercp/CRC32 @ ^2.0.0
+  maxpromer/PCA9557-arduino
 
 [env:ThinkNode_M5_Repeater]
 extends = ThinkNode_M5
diff --git a/variants/thinknode_m5/target.cpp b/variants/thinknode_m5/target.cpp
index c65696c2..2c388b58 100644
--- a/variants/thinknode_m5/target.cpp
+++ b/variants/thinknode_m5/target.cpp
@@ -15,6 +15,7 @@ WRAPPER_CLASS radio_driver(radio, board);
 ESP32RTCClock fallback_clock;
 AutoDiscoverRTCClock rtc_clock(fallback_clock);
 SensorManager sensors;
+PCA9557 expander (0x18, &Wire1);
 
 #ifdef DISPLAY_CLASS
   DISPLAY_CLASS display;
@@ -26,6 +27,11 @@ bool radio_init() {
   rtc_clock.begin(Wire);
 //  pinMode(21, INPUT);
 //  pinMode(48, OUTPUT);
+  Wire1.begin(48, 47);
+  expander.pinMode(4, OUTPUT); // eink
+  expander.pinMode(5, OUTPUT); // peripherals
+  expander.digitalWrite(4, HIGH);
+  expander.digitalWrite(5, HIGH);
   #if defined(P_LORA_SCLK)
   spi.begin(P_LORA_SCLK, P_LORA_MISO, P_LORA_MOSI);
   return radio.std_init(&spi);
diff --git a/variants/thinknode_m5/target.h b/variants/thinknode_m5/target.h
index 75b68ae4..7fa749f8 100644
--- a/variants/thinknode_m5/target.h
+++ b/variants/thinknode_m5/target.h
@@ -12,11 +12,14 @@
   #include <helpers/ui/GxEPDDisplay.h>
   #include <helpers/ui/MomentaryButton.h>
 #endif
+#include <Wire.h>
+#include <PCA9557.h>
 
 extern ThinknodeM5Board board;
 extern WRAPPER_CLASS radio_driver;
 extern AutoDiscoverRTCClock rtc_clock;
 extern SensorManager sensors;
+extern PCA9557 expander;
 
 #ifdef DISPLAY_CLASS
   extern DISPLAY_CLASS display;
diff --git a/variants/thinknode_m5/variant.h b/variants/thinknode_m5/variant.h
index 6118bd75..d312fcbf 100644
--- a/variants/thinknode_m5/variant.h
+++ b/variants/thinknode_m5/variant.h
@@ -7,8 +7,8 @@
 #define PIN_VEXT_EN_ACTIVE HIGH
 #define PIN_VEXT_EN 46
 #define PIN_USER_BTN 21
-#define PIN_LED 3
-#define PIN_STATUS_LED 1
+//#define PIN_LED 3
+//#define PIN_STATUS_LED 1
 #define PIN_PWRBTN 14
 
 #define PIN_DISPLAY_MISO               (-1)
@@ -18,4 +18,4 @@
 #define PIN_DISPLAY_DC                 (40)
 #define PIN_DISPLAY_RST                (41)
 #define PIN_DISPLAY_BUSY               (42)
-#define DISP_BACKLIGHT          (5)
\ No newline at end of file
+//#define DISP_BACKLIGHT          (5)
\ No newline at end of file