LSM6DS3TR-C support (#3593)

* started work on pulling in the unphone library and dependencies, to do e.g. power switch management and etc.; currently failing at Adafruit_ImageReader

* now compiles with unphoneLibrary included

* successfully pulled in unphone library to manage power switch and init vibe motor and etc.
doesnt print to serial tho...

* simplified the build a bit; when doing meshtastic do not depend on the MCCI lora libs etc., then also no need to config them via build flags

* version that doesnt trigger brownout

* cleaned up initVariant a little

* note re. GPS

* back to mesh upstream version

* this time we're back to mesh upstream version

* getting LSM6DS3TRC driver installed

* shake to wake works, set threshold quite low may need increasing

* whats the crack with these end of file changes?

* paramatize the wake threshold

* try to get the PR to just include real changes

* got the right config item and also not giving compiler messages

* moved the lib_deps for the LSM6DS3TRC driver from our variant platformio.ini to the main one in root so all boards have it

* stuupid error #define-ing

---------

Co-authored-by: Hamish Cunningham <hamish@gate.ac.uk>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

platformio.ini

@@ -132,3 +132,4 @@ lib_deps =
   adafruit/Adafruit MPU6050@^2.2.4
   adafruit/Adafruit LIS3DH@^1.2.4
   https://github.com/lewisxhe/SensorLib#27fd0f721e20cd09e1f81383f0ba58a54fe84a17
+  adafruit/Adafruit LSM6DS@^4.7.2

src/AccelerometerThread.h

@@ -5,6 +5,7 @@
 #include "power.h"
 
 #include <Adafruit_LIS3DH.h>
+#include <Adafruit_LSM6DS3TRC.h>
 #include <Adafruit_MPU6050.h>
 #include <Arduino.h>
 #include <SensorBMA423.hpp>
@@ -108,6 +109,15 @@ class AccelerometerThread : public concurrency::OSThread
             bmaSensor.enableTiltIRQ();
             // It corresponds to isDoubleClick interrupt
             bmaSensor.enableWakeupIRQ();
+        } else if (acceleremoter_type == ScanI2C::DeviceType::LSM6DS3 && lsm.begin_I2C(accelerometer_found.address)) {
+            LOG_DEBUG("LSM6DS3 initializing\n");
+            // Default threshold of 2G, less sensitive options are 4, 8 or 16G
+            lsm.setAccelRange(LSM6DS_ACCEL_RANGE_2_G);
+#ifndef LSM6DS3_WAKE_THRESH
+#define LSM6DS3_WAKE_THRESH 20
+#endif
+            lsm.enableWakeup(config.display.wake_on_tap_or_motion, 1, LSM6DS3_WAKE_THRESH);
+            // Duration is number of occurances needed to trigger, higher threshold is less sensitive
         }
     }
 
@@ -133,6 +143,9 @@ class AccelerometerThread : public concurrency::OSThread
                 wakeScreen();
                 return 500;
             }
+        } else if (acceleremoter_type == ScanI2C::DeviceType::LSM6DS3 && lsm.shake()) {
+            wakeScreen();
+            return 500;
         }
 
         return ACCELEROMETER_CHECK_INTERVAL_MS;
@@ -156,6 +169,7 @@ class AccelerometerThread : public concurrency::OSThread
     ScanI2C::DeviceType acceleremoter_type;
     Adafruit_MPU6050 mpu;
     Adafruit_LIS3DH lis;
+    Adafruit_LSM6DS3TRC lsm;
 };
 
 } // namespace concurrency

src/configuration.h

@@ -128,6 +128,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MPU6050_ADDR 0x68
 #define LIS3DH_ADR 0x18
 #define BMA423_ADDR 0x19
+#define LSM6DS3_ADDR 0x6A
 
 // -----------------------------------------------------------------------------
 // LED

src/detect/ScanI2C.cpp

@@ -36,8 +36,8 @@ ScanI2C::FoundDevice ScanI2C::firstKeyboard() const
 
 ScanI2C::FoundDevice ScanI2C::firstAccelerometer() const
 {
-    ScanI2C::DeviceType types[] = {MPU6050, LIS3DH, BMA423};
-    return firstOfOrNONE(3, types);
+    ScanI2C::DeviceType types[] = {MPU6050, LIS3DH, BMA423, LSM6DS3};
+    return firstOfOrNONE(4, types);
 }
 
 ScanI2C::FoundDevice ScanI2C::find(ScanI2C::DeviceType) const

src/detect/ScanI2C.h

@@ -39,6 +39,7 @@ class ScanI2C
         LIS3DH,
         BMA423,
         BQ24295,
+        LSM6DS3,
 #ifdef HAS_NCP5623
         NCP5623,
 #endif

src/detect/ScanI2CTwoWire.cpp

@@ -310,6 +310,7 @@ void ScanI2CTwoWire::scanPort(I2CPort port)
                 SCAN_SIMPLE_CASE(PMSA0031_ADDR, PMSA0031, "PMSA0031 air quality sensor found\n")
                 SCAN_SIMPLE_CASE(MPU6050_ADDR, MPU6050, "MPU6050 accelerometer found\n");
                 SCAN_SIMPLE_CASE(BMA423_ADDR, BMA423, "BMA423 accelerometer found\n");
+                SCAN_SIMPLE_CASE(LSM6DS3_ADDR, LSM6DS3, "LSM6DS3 accelerometer found\n");
 
             default:
                 LOG_INFO("Device found at address 0x%x was not able to be enumerated\n", addr.address);

variants/unphone/variant.h

@@ -53,6 +53,8 @@
 #define I2C_SDA 3 // I2C pins for this board
 #define I2C_SCL 4
 
+#define LSM6DS3_WAKE_THRESH 5 // higher values reduce the sensitivity of the wake threshold
+
 // ratio of voltage divider = 3.20 (R1=100k, R2=220k)
 // #define ADC_MULTIPLIER 3.2