change the main scan class so they scan only for wanted bits - UNTESTED

src/detect/ScanI2C.cpp

@@ -1,6 +1,4 @@
 #include "ScanI2C.h"
-#include "main.h"
-#include <Wire.h>
 
 const ScanI2C::DeviceAddress ScanI2C::ADDRESS_NONE = ScanI2C::DeviceAddress();
 const ScanI2C::FoundDevice ScanI2C::DEVICE_NONE = ScanI2C::FoundDevice(ScanI2C::DeviceType::NONE, ADDRESS_NONE);
@@ -8,6 +6,7 @@ const ScanI2C::FoundDevice ScanI2C::DEVICE_NONE = ScanI2C::FoundDevice(ScanI2C::
 ScanI2C::ScanI2C() = default;
 
 void ScanI2C::scanPort(ScanI2C::I2CPort port) {}
+void ScanI2C::scanPort(ScanI2C::I2CPort port, int *address) {}
 
 void ScanI2C::setSuppressScreen()
 {
@@ -29,33 +28,7 @@ ScanI2C::FoundDevice ScanI2C::firstRTC() const
     ScanI2C::DeviceType types[] = {RTC_RV3028, RTC_PCF8563};
     return firstOfOrNONE(2, types);
 }
-bool performScanForCardKB() {
-    // Example I2C scan code for CardKB (adjust as needed)
-    Wire.beginTransmission(CARDKB_I2C_ADDRESS);
-    if (Wire.endTransmission() == 0) {
-        return true; // CardKB detected
-    }
-    return false; // CardKB not detected
-}
-void scanForCardKB() {
-    const int maxRetries = 10; // Maximum number of retries
-    const int retryDelay = 100; // Delay between retries in milliseconds
 
-    for (int i = 0; i < maxRetries; ++i) {
-        // Perform the scan (example scan code, adjust as needed)
-        cardKBDetected = performScanForCardKB();
-
-        if (cardKBDetected) {
-            Serial.println("CardKB Keyboard detected.");
-            break;
-        }
-
-        delay(retryDelay); // Wait before the next retry
-    }
-    if (!cardKBDetected) {
-        Serial.println("CardKB Keyboard not detected. Canned Message Module Disabled.");
-    }
-}
 ScanI2C::FoundDevice ScanI2C::firstKeyboard() const
 {
     ScanI2C::DeviceType types[] = {CARDKB, TDECKKB, BBQ10KB, RAK14004};

src/detect/ScanI2C.h

@@ -2,7 +2,6 @@
 
 #include <stddef.h>
 #include <stdint.h>
-bool performScanForCardKB();
 
 class ScanI2C
 {
@@ -89,6 +88,7 @@ class ScanI2C
     ScanI2C();
 
     virtual void scanPort(ScanI2C::I2CPort);
+    virtual void scanPort(ScanI2C::I2CPort, int *);
 
     /*
      * A bit of a hack, this tells the scanner not to tell later systems there is a screen to avoid enabling it.

src/detect/ScanI2CTwoWire.cpp

@@ -135,7 +135,7 @@ uint16_t ScanI2CTwoWire::getRegisterValue(const ScanI2CTwoWire::RegisterLocation
         type = T;                                                                                                                \
         break;
 
-void ScanI2CTwoWire::scanPort(I2CPort port)
+void ScanI2CTwoWire::scanPort(I2CPort port, int *address)
 {
     concurrency::LockGuard guard((concurrency::Lock *)&lock);
 
@@ -163,6 +163,10 @@ void ScanI2CTwoWire::scanPort(I2CPort port)
 #endif
 
     for (addr.address = 1; addr.address < 127; addr.address++) {
+        // Skip the address if it is not requested oon a partial scan
+        if (sizeof(address) > 0 && addr.address != *address) {
+            continue;
+        }
         i2cBus->beginTransmission(addr.address);
 #ifdef ARCH_PORTDUINO
         if (i2cBus->read() != -1)
@@ -367,6 +371,11 @@ void ScanI2CTwoWire::scanPort(I2CPort port)
     }
 }
 
+void ScanI2CTwoWire::scanPort(I2CPort port)
+{
+    scanPort(port, nullptr);
+}
+
 TwoWire *ScanI2CTwoWire::fetchI2CBus(ScanI2C::DeviceAddress address) const
 {
     if (address.port == ScanI2C::I2CPort::WIRE) {

src/detect/ScanI2CTwoWire.h

@@ -16,6 +16,8 @@ class ScanI2CTwoWire : public ScanI2C
   public:
     void scanPort(ScanI2C::I2CPort) override;
 
+    void scanPort(ScanI2C::I2CPort, int *) override;
+
     ScanI2C::FoundDevice find(ScanI2C::DeviceType) const override;
 
     TwoWire *fetchI2CBus(ScanI2C::DeviceAddress) const;

src/input/kbI2cBase.cpp

@@ -1,6 +1,7 @@
 #include "kbI2cBase.h"
 #include "configuration.h"
 #include "detect/ScanI2C.h"
+#include "detect/ScanI2CTwoWire.h"
 
 extern ScanI2C::DeviceAddress cardkb_found;
 extern uint8_t kb_model;
@@ -30,7 +31,39 @@ uint8_t read_from_14004(TwoWire *i2cBus, uint8_t reg, uint8_t *data, uint8_t len
 int32_t KbI2cBase::runOnce()
 {
     if (cardkb_found.address == 0x00) {
-        // Input device is not detected.
+        // Input device is not detected. Rescan now.
+        auto i2cScanner = std::unique_ptr<ScanI2CTwoWire>(new ScanI2CTwoWire());
+        int i2caddr_scan[] = {CARDKB_ADDR, TDECK_KB_ADDR, BBQ10_KB_ADDR};
+#if defined(I2C_SDA1)
+        i2cScanner->scanPort(ScanI2C::I2CPort::WIRE1, i2caddr_scan);
+#endif
+        i2cScanner->scanPort(ScanI2C::I2CPort::WIRE, i2caddr_scan);
+        auto kb_info = i2cScanner->firstKeyboard();
+
+        if (kb_info.type != ScanI2C::DeviceType::NONE) {
+            cardkb_found = kb_info.address;
+            switch (kb_info.type) {
+            case ScanI2C::DeviceType::RAK14004:
+                kb_model = 0x02;
+                break;
+            case ScanI2C::DeviceType::CARDKB:
+                kb_model = 0x00;
+                break;
+            case ScanI2C::DeviceType::TDECKKB:
+                // assign an arbitrary value to distinguish from other models
+                kb_model = 0x10;
+                break;
+            case ScanI2C::DeviceType::BBQ10KB:
+                // assign an arbitrary value to distinguish from other models
+                kb_model = 0x11;
+                break;
+            default:
+                // use this as default since it's also just zero
+                LOG_WARN("kb_info.type is unknown(0x%02x), setting kb_model=0x00\n", kb_info.type);
+                kb_model = 0x00;
+            }
+        }
+        if (cardkb_found.address == 0x00)
             return INT32_MAX;
     }
 

src/main.cpp

@@ -35,8 +35,6 @@
 #include <utility>
 // #include <driver/rtc_io.h>
 
-bool cardKBDetected = false; 
-void scanForCardKB();
 #ifdef ARCH_ESP32
 #if !MESHTASTIC_EXCLUDE_WEBSERVER
 #include "mesh/http/WebServer.h"
@@ -378,7 +376,6 @@ void setup()
     // otherwise keyboard and touch screen will not work
     delay(800);
 #endif
-scanForCardKB(); // Initial scan for CardKB
 
     // Currently only the tbeam has a PMU
     // PMU initialization needs to be placed before i2c scanning

src/main.h

@@ -21,7 +21,7 @@ extern NimbleBluetooth *nimbleBluetooth;
 #include "NRF52Bluetooth.h"
 extern NRF52Bluetooth *nrf52Bluetooth;
 #endif
-extern bool cardKBDetected;
+
 #if ARCH_PORTDUINO
 extern HardwareSPI *DisplaySPI;
 extern HardwareSPI *LoraSPI;
@@ -39,7 +39,6 @@ extern bool pmu_found;
 extern bool isCharging;
 extern bool isUSBPowered;
 
-#define CARDKB_I2C_ADDRESS 0x5F // Replace 0x5F with the actual address if different
 #if !defined(ARCH_PORTDUINO) && !defined(ARCH_STM32WL)
 extern ATECCX08A atecc;
 #endif