Remove call to randomSeed() (#2374)

This function causes the new arduino-esp32 core to revert to the pseudorandom behavior specified in Arduino.
Calls to random() automatically use esp_random() if randomSeed or useRealRandomGenerator(false) aren't called.
Tentative fix for #2357

arch/esp32/esp32c3.ini

@@ -0,0 +1,45 @@
+[esp32c3_base]
+extends = arduino_base
+platform = platformio/espressif32@^6.1.0
+build_src_filter = 
+  ${arduino_base.build_src_filter} -<platform/nrf52/> -<platform/stm32wl> -<platform/rp2040> -<mesh/eth/>
+upload_speed = 961200
+monitor_speed = 115200
+debug_init_break = tbreak setup
+monitor_filters = esp32_c3_exception_decoder
+board_build.filesystem = littlefs
+
+# Remove -DMYNEWT_VAL_BLE_HS_LOG_LVL=LOG_LEVEL_CRITICAL for low level BLE logging.
+# See library directory for BLE logging possible values: .pio/libdeps/tbeam/NimBLE-Arduino/src/log_common/log_common.h
+# This overrides the BLE logging default of LOG_LEVEL_INFO (1) from: .pio/libdeps/tbeam/NimBLE-Arduino/src/esp_nimble_cfg.h
+build_flags =
+  ${arduino_base.build_flags} 
+  -Wall 
+  -Wextra 
+  -Isrc/platform/esp32 
+  -std=c++11 
+  -DLOG_LOCAL_LEVEL=ESP_LOG_DEBUG 
+  -DCORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_DEBUG 
+  -DMYNEWT_VAL_BLE_HS_LOG_LVL=LOG_LEVEL_CRITICAL
+  -DCONFIG_BT_NIMBLE_ENABLED 
+  -DCONFIG_NIMBLE_CPP_LOG_LEVEL=2
+  -DCONFIG_BT_NIMBLE_MAX_CCCDS=20
+  -DESP_OPENSSL_SUPPRESS_LEGACY_WARNING
+  ;-DDEBUG_HEAP
+  
+lib_deps =
+  ${arduino_base.lib_deps}
+  ${networking_base.lib_deps}
+  ${environmental_base.lib_deps}
+  https://github.com/meshtastic/esp32_https_server.git#23665b3adc080a311dcbb586ed5941b5f94d6ea2
+  h2zero/NimBLE-Arduino@^1.4.0
+  https://github.com/lewisxhe/XPowersLib.git#84b7373faea3118b6c37954d52f98b8a337148d6
+  caveman99/ESP32 Codec2@^1.0.1
+
+lib_ignore = 
+  segger_rtt
+  ESP32 BLE Arduino
+
+; customize the partition table
+; http://docs.platformio.org/en/latest/platforms/espressif32.html#partition-tables
+board_build.partitions = partition-table.csv

monitor/filter_c3_exception_decoder.py

@@ -0,0 +1,155 @@
+# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import re
+import subprocess
+import sys
+
+from platformio.project.exception import PlatformioException
+from platformio.public import (
+    DeviceMonitorFilterBase,
+    load_build_metadata,
+)
+
+# By design, __init__ is called inside miniterm and we can't pass context to it.
+# pylint: disable=attribute-defined-outside-init
+
+IS_WINDOWS = sys.platform.startswith("win")
+
+
+class Esp32C3ExceptionDecoder(DeviceMonitorFilterBase):
+    NAME = "esp32_c3_exception_decoder"
+
+    PCADDR_PATTERN = re.compile(r'0x4[0-9a-f]{7}', re.IGNORECASE)
+
+    def __call__(self):
+        self.buffer = ""
+        self.pcaddr_re = self.PCADDR_PATTERN
+
+        self.firmware_path = None
+        self.addr2line_path = None
+        self.enabled = self.setup_paths()
+
+        if self.config.get("env:" + self.environment, "build_type") != "debug":
+            print(
+                """
+Please build project in debug configuration to get more details about an exception.
+See https://docs.platformio.org/page/projectconf/build_configurations.html
+
+"""
+            )
+
+        return self
+
+    def setup_paths(self):
+        self.project_dir = os.path.abspath(self.project_dir)
+        try:
+            data = load_build_metadata(self.project_dir, self.environment)
+            self.firmware_path = data["prog_path"]
+            if not os.path.isfile(self.firmware_path):
+                sys.stderr.write(
+                    "%s: disabling, firmware at %s does not exist, rebuild the project?\n"
+                    % (self.__class__.__name__, self.firmware_path)
+                )
+                return False
+
+            if self.addr2line_path is None:
+                cc_path = data.get("cc_path", "")
+                if "-gcc" in cc_path:
+                    self.addr2line_path = cc_path.replace("-gcc", "-addr2line")
+                else:
+                    sys.stderr.write(
+                        "%s: disabling, failed to find addr2line.\n"
+                        % self.__class__.__name__
+                    )
+                    return False
+                
+            if not os.path.isfile(self.addr2line_path):
+                sys.stderr.write(
+                    "%s: disabling, addr2line at %s does not exist\n"
+                    % (self.__class__.__name__, self.addr2line_path)
+                )
+                return False
+                
+            return True
+        except PlatformioException as e:
+            sys.stderr.write(
+                "%s: disabling, exception while looking for addr2line: %s\n"
+                % (self.__class__.__name__, e)
+            )
+            return False
+
+    def rx(self, text):
+        if not self.enabled:
+            return text
+
+        last = 0
+        while True:
+            idx = text.find("\n", last)
+            if idx == -1:
+                if len(self.buffer) < 4096:
+                    self.buffer += text[last:]
+                break
+
+            line = text[last:idx]
+            if self.buffer:
+                line = self.buffer + line
+                self.buffer = ""
+            last = idx + 1
+
+            # Output each trace on a separate line below ours
+            # Logic identical to https://github.com/espressif/esp-idf/blob/master/tools/idf_monitor_base/logger.py#L131
+            for m in re.finditer(self.pcaddr_re, line):
+                if m is None:
+                    continue
+
+                trace = self.get_backtrace(m)
+                if len(trace) != "":
+                    text = text[: last] + trace + text[last :]
+                    last += len(trace)
+
+        return text
+
+    def get_backtrace(self, match):
+        trace = "\n"
+        enc = "mbcs" if IS_WINDOWS else "utf-8"
+        args = [self.addr2line_path, u"-fipC", u"-e", self.firmware_path]
+        try:
+            addr = match.group()
+            output = (
+                subprocess.check_output(args + [addr])
+                .decode(enc)
+                .strip()
+            )
+            output = output.replace(
+                "\n", "\n     "
+            )  # newlines happen with inlined methods
+            output = self.strip_project_dir(output)
+            # Output the trace in yellow color so that it is easier to spot
+            trace += "\033[33m=> %s: %s\033[0m\n" % (addr, output)
+        except subprocess.CalledProcessError as e:
+            sys.stderr.write(
+                "%s: failed to call %s: %s\n"
+                % (self.__class__.__name__, self.addr2line_path, e)
+            )
+        return trace
+
+    def strip_project_dir(self, trace):
+        while True:
+            idx = trace.find(self.project_dir)
+            if idx == -1:
+                break
+            trace = trace[:idx] + trace[idx + len(self.project_dir) + 1 :]
+        return trace

platformio.ini

@@ -111,3 +111,5 @@ lib_deps =
   adafruit/Adafruit LPS2X@^2.0.4
   adafruit/Adafruit SHT31 Library@^2.2.0
   adafruit/Adafruit PM25 AQI Sensor@^1.0.6
+  adafruit/Adafruit MPU6050@^2.2.4
+  adafruit/Adafruit LIS3DH@^1.2.4

src/AccelerometerThread.h

@@ -0,0 +1,67 @@
+#include "PowerFSM.h"
+#include "concurrency/OSThread.h"
+#include "configuration.h"
+#include "main.h"
+#include "power.h"
+
+#include <Adafruit_LIS3DH.h>
+#include <Adafruit_MPU6050.h>
+
+namespace concurrency
+{
+class AccelerometerThread : public concurrency::OSThread
+{
+  public:
+    AccelerometerThread(ScanI2C::DeviceType type = ScanI2C::DeviceType::NONE) : OSThread("AccelerometerThread")
+    {
+        if (accelerometer_found.port == ScanI2C::I2CPort::NO_I2C || !config.display.wake_on_tap_or_motion) {
+            disable();
+            return;
+        }
+        accleremoter_type = type;
+        LOG_DEBUG("AccelerometerThread initializing\n");
+
+        if (accleremoter_type == ScanI2C::DeviceType::MPU6050 && mpu.begin(accelerometer_found.address)) {
+            LOG_DEBUG("MPU6050 initializing\n");
+            // setup motion detection
+            mpu.setHighPassFilter(MPU6050_HIGHPASS_0_63_HZ);
+            mpu.setMotionDetectionThreshold(1);
+            mpu.setMotionDetectionDuration(20);
+            mpu.setInterruptPinLatch(true); // Keep it latched.  Will turn off when reinitialized.
+            mpu.setInterruptPinPolarity(true);
+        } else if (accleremoter_type == ScanI2C::DeviceType::LIS3DH && lis.begin(accelerometer_found.address)) {
+            LOG_DEBUG("LIS3DH initializing\n");
+            lis.setRange(LIS3DH_RANGE_2_G);
+
+            // Adjust threshhold, higher numbers are less sensitive
+            lis.setClick(1, 80);
+        }
+    }
+
+  protected:
+    int32_t runOnce() override
+    {
+        canSleep = true; // Assume we should not keep the board awake
+
+        if (accleremoter_type == ScanI2C::DeviceType::MPU6050 && mpu.getMotionInterruptStatus()) {
+            wakeScreen();
+        } else if (accleremoter_type == ScanI2C::DeviceType::LIS3DH && lis.getClick() > 0) {
+            wakeScreen();
+        }
+        return 100;
+    }
+
+  private:
+    void wakeScreen()
+    {
+        LOG_DEBUG("Tap or motion detected. Turning on screen\n");
+        if (powerFSM.getState() == &stateDARK) {
+            powerFSM.trigger(EVENT_INPUT);
+        }
+    }
+    ScanI2C::DeviceType accleremoter_type;
+    Adafruit_MPU6050 mpu;
+    Adafruit_LIS3DH lis;
+};
+
+} // namespace concurrency

src/PowerFSM.h

@@ -23,6 +23,6 @@
 #define EVENT_INPUT 17           // input broker wants something, we need to wake up and enable screen
 
 extern Fsm powerFSM;
-extern State statePOWER, stateSERIAL;
+extern State stateON, statePOWER, stateSERIAL, stateDARK;
 
 void PowerFSM_setup();

src/configuration.h

@@ -118,6 +118,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define SHT31_ADDR 0x44
 #define PMSA0031_ADDR 0x12
 
+// -----------------------------------------------------------------------------
+// ACCELEROMETER
+// -----------------------------------------------------------------------------
+#define MPU6050_ADDR 0x68
+#define LIS3DH_ADR 0x18
+
 // -----------------------------------------------------------------------------
 // Security
 // -----------------------------------------------------------------------------

src/detect/ScanI2C.cpp

@@ -34,6 +34,12 @@ ScanI2C::FoundDevice ScanI2C::firstKeyboard() const
     return firstOfOrNONE(2, types);
 }
 
+ScanI2C::FoundDevice ScanI2C::firstAccelerometer() const
+{
+    ScanI2C::DeviceType types[] = {MPU6050, LIS3DH};
+    return firstOfOrNONE(2, types);
+}
+
 ScanI2C::FoundDevice ScanI2C::find(ScanI2C::DeviceType) const
 {
     return DEVICE_NONE;

src/detect/ScanI2C.h

@@ -31,6 +31,8 @@ class ScanI2C
         QMI8658,
         QMC5883L,
         PMSA0031,
+        MPU6050,
+        LIS3DH,
     } DeviceType;
 
     // typedef uint8_t DeviceAddress;
@@ -79,6 +81,8 @@ class ScanI2C
 
     FoundDevice firstKeyboard() const;
 
+    FoundDevice firstAccelerometer() const;
+
     virtual FoundDevice find(DeviceType) const;
 
     virtual bool exists(DeviceType) const;

src/detect/ScanI2CTwoWire.cpp

@@ -248,7 +248,17 @@ void ScanI2CTwoWire::scanPort(I2CPort port)
                 }
                 break;
 
-                SCAN_SIMPLE_CASE(MCP9808_ADDR, MCP9808, "MCP9808 sensor found\n")
+            case MCP9808_ADDR:
+                registerValue = getRegisterValue(ScanI2CTwoWire::RegisterLocation(addr, 0x07), 2);
+                if (registerValue == 0x0400) {
+                    type = MCP9808;
+                    LOG_INFO("MCP9808 sensor found\n");
+                } else {
+                    type = LIS3DH;
+                    LOG_INFO("LIS3DH accelerometer found\n");
+                }
+
+                break;
 
                 SCAN_SIMPLE_CASE(SHT31_ADDR, SHT31, "SHT31 sensor found\n")
                 SCAN_SIMPLE_CASE(SHTC3_ADDR, SHTC3, "SHTC3 sensor found\n")
@@ -261,11 +271,11 @@ void ScanI2CTwoWire::scanPort(I2CPort port)
                 SCAN_SIMPLE_CASE(QMC5883L_ADDR, QMC5883L, "QMC5883L Highrate 3-Axis magnetic sensor found\n")
 
                 SCAN_SIMPLE_CASE(PMSA0031_ADDR, PMSA0031, "PMSA0031 air quality sensor found\n")
+                SCAN_SIMPLE_CASE(MPU6050_ADDR, MPU6050, "MPU6050 accelerometer found\n");
 
             default:
                 LOG_INFO("Device found at address 0x%x was not able to be enumerated\n", addr.address);
             }
-
         } else if (err == 4) {
             LOG_ERROR("Unknown error at address 0x%x\n", addr);
         }

src/main.cpp

@@ -68,6 +68,10 @@ NRF52Bluetooth *nrf52Bluetooth;
 #endif
 #include "PowerFSMThread.h"
 
+#if !defined(ARCH_PORTDUINO)
+#include "AccelerometerThread.h"
+#endif
+
 using namespace concurrency;
 
 // We always create a screen object, but we only init it if we find the hardware
@@ -94,6 +98,8 @@ uint8_t kb_model;
 
 // The I2C address of the RTC Module (if found)
 ScanI2C::DeviceAddress rtc_found = ScanI2C::ADDRESS_NONE;
+// The I2C address of the Accelerometer (if found)
+ScanI2C::DeviceAddress accelerometer_found = ScanI2C::ADDRESS_NONE;
 
 #if !defined(ARCH_PORTDUINO) && !defined(ARCH_STM32WL)
 ATECCX08A atecc;
@@ -163,6 +169,7 @@ static OSThread *powerFSMthread;
 static OSThread *buttonThread;
 uint32_t ButtonThread::longPressTime = 0;
 #endif
+static OSThread *accelerometerThread;
 
 RadioInterface *rIf = NULL;
 
@@ -350,6 +357,15 @@ void setup()
      * nodeTelemetrySensorsMap singleton. This wraps that logic in a temporary scope to declare the temporary field
      * "found".
      */
+#if !defined(ARCH_PORTDUINO)
+    auto acc_info = i2cScanner->firstAccelerometer();
+    accelerometer_found = acc_info.type != ScanI2C::DeviceType::NONE ? acc_info.address : accelerometer_found;
+
+    LOG_DEBUG("acc_info = %i\n", acc_info.type);
+    if (acc_info.type != ScanI2C::DeviceType::NONE) {
+        accelerometerThread = new AccelerometerThread(acc_info.type);
+    }
+#endif
 
 #define STRING(S) #S
 

src/main.h

@@ -24,6 +24,7 @@ extern ScanI2C::DeviceAddress screen_found;
 extern ScanI2C::DeviceAddress cardkb_found;
 extern uint8_t kb_model;
 extern ScanI2C::DeviceAddress rtc_found;
+extern ScanI2C::DeviceAddress accelerometer_found;
 
 extern bool eink_found;
 extern bool pmu_found;

src/mesh/generated/meshtastic/config.pb.h

@@ -360,6 +360,8 @@ typedef struct _meshtastic_Config_DisplayConfig {
     meshtastic_Config_DisplayConfig_DisplayMode displaymode;
     /* Print first line in pseudo-bold? FALSE is original style, TRUE is bold */
     bool heading_bold;
+    /* Should we wake the screen up on accelerometer detected motion or tap */
+    bool wake_on_tap_or_motion;
 } meshtastic_Config_DisplayConfig;
 
 /* Lora Config */
@@ -526,7 +528,7 @@ extern "C" {
 #define meshtastic_Config_PowerConfig_init_default {0, 0, 0, 0, 0, 0, 0, 0}
 #define meshtastic_Config_NetworkConfig_init_default {0, "", "", "", 0, _meshtastic_Config_NetworkConfig_AddressMode_MIN, false, meshtastic_Config_NetworkConfig_IpV4Config_init_default, ""}
 #define meshtastic_Config_NetworkConfig_IpV4Config_init_default {0, 0, 0, 0}
-#define meshtastic_Config_DisplayConfig_init_default {0, _meshtastic_Config_DisplayConfig_GpsCoordinateFormat_MIN, 0, 0, 0, _meshtastic_Config_DisplayConfig_DisplayUnits_MIN, _meshtastic_Config_DisplayConfig_OledType_MIN, _meshtastic_Config_DisplayConfig_DisplayMode_MIN, 0}
+#define meshtastic_Config_DisplayConfig_init_default {0, _meshtastic_Config_DisplayConfig_GpsCoordinateFormat_MIN, 0, 0, 0, _meshtastic_Config_DisplayConfig_DisplayUnits_MIN, _meshtastic_Config_DisplayConfig_OledType_MIN, _meshtastic_Config_DisplayConfig_DisplayMode_MIN, 0, 0}
 #define meshtastic_Config_LoRaConfig_init_default {0, _meshtastic_Config_LoRaConfig_ModemPreset_MIN, 0, 0, 0, 0, _meshtastic_Config_LoRaConfig_RegionCode_MIN, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0}}
 #define meshtastic_Config_BluetoothConfig_init_default {0, _meshtastic_Config_BluetoothConfig_PairingMode_MIN, 0}
 #define meshtastic_Config_init_zero              {0, {meshtastic_Config_DeviceConfig_init_zero}}
@@ -535,7 +537,7 @@ extern "C" {
 #define meshtastic_Config_PowerConfig_init_zero  {0, 0, 0, 0, 0, 0, 0, 0}
 #define meshtastic_Config_NetworkConfig_init_zero {0, "", "", "", 0, _meshtastic_Config_NetworkConfig_AddressMode_MIN, false, meshtastic_Config_NetworkConfig_IpV4Config_init_zero, ""}
 #define meshtastic_Config_NetworkConfig_IpV4Config_init_zero {0, 0, 0, 0}
-#define meshtastic_Config_DisplayConfig_init_zero {0, _meshtastic_Config_DisplayConfig_GpsCoordinateFormat_MIN, 0, 0, 0, _meshtastic_Config_DisplayConfig_DisplayUnits_MIN, _meshtastic_Config_DisplayConfig_OledType_MIN, _meshtastic_Config_DisplayConfig_DisplayMode_MIN, 0}
+#define meshtastic_Config_DisplayConfig_init_zero {0, _meshtastic_Config_DisplayConfig_GpsCoordinateFormat_MIN, 0, 0, 0, _meshtastic_Config_DisplayConfig_DisplayUnits_MIN, _meshtastic_Config_DisplayConfig_OledType_MIN, _meshtastic_Config_DisplayConfig_DisplayMode_MIN, 0, 0}
 #define meshtastic_Config_LoRaConfig_init_zero   {0, _meshtastic_Config_LoRaConfig_ModemPreset_MIN, 0, 0, 0, 0, _meshtastic_Config_LoRaConfig_RegionCode_MIN, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0}}
 #define meshtastic_Config_BluetoothConfig_init_zero {0, _meshtastic_Config_BluetoothConfig_PairingMode_MIN, 0}
 
@@ -585,6 +587,7 @@ extern "C" {
 #define meshtastic_Config_DisplayConfig_oled_tag 7
 #define meshtastic_Config_DisplayConfig_displaymode_tag 8
 #define meshtastic_Config_DisplayConfig_heading_bold_tag 9
+#define meshtastic_Config_DisplayConfig_wake_on_tap_or_motion_tag 10
 #define meshtastic_Config_LoRaConfig_use_preset_tag 1
 #define meshtastic_Config_LoRaConfig_modem_preset_tag 2
 #define meshtastic_Config_LoRaConfig_bandwidth_tag 3
@@ -696,7 +699,8 @@ X(a, STATIC,   SINGULAR, BOOL,     flip_screen,       5) \
 X(a, STATIC,   SINGULAR, UENUM,    units,             6) \
 X(a, STATIC,   SINGULAR, UENUM,    oled,              7) \
 X(a, STATIC,   SINGULAR, UENUM,    displaymode,       8) \
-X(a, STATIC,   SINGULAR, BOOL,     heading_bold,      9)
+X(a, STATIC,   SINGULAR, BOOL,     heading_bold,      9) \
+X(a, STATIC,   SINGULAR, BOOL,     wake_on_tap_or_motion,  10)
 #define meshtastic_Config_DisplayConfig_CALLBACK NULL
 #define meshtastic_Config_DisplayConfig_DEFAULT NULL
 
@@ -750,7 +754,7 @@ extern const pb_msgdesc_t meshtastic_Config_BluetoothConfig_msg;
 /* Maximum encoded size of messages (where known) */
 #define meshtastic_Config_BluetoothConfig_size   10
 #define meshtastic_Config_DeviceConfig_size      26
-#define meshtastic_Config_DisplayConfig_size     26
+#define meshtastic_Config_DisplayConfig_size     28
 #define meshtastic_Config_LoRaConfig_size        77
 #define meshtastic_Config_NetworkConfig_IpV4Config_size 20
 #define meshtastic_Config_NetworkConfig_size     195

src/mesh/generated/meshtastic/deviceonly.pb.h

@@ -188,7 +188,7 @@ extern const pb_msgdesc_t meshtastic_OEMStore_msg;
 /* Maximum encoded size of messages (where known) */
 #define meshtastic_ChannelFile_size              638
 #define meshtastic_DeviceState_size              21800
-#define meshtastic_OEMStore_size                 3006
+#define meshtastic_OEMStore_size                 3008
 
 #ifdef __cplusplus
 } /* extern "C" */

src/mesh/generated/meshtastic/localonly.pb.h

@@ -156,7 +156,7 @@ extern const pb_msgdesc_t meshtastic_LocalModuleConfig_msg;
 #define meshtastic_LocalModuleConfig_fields &meshtastic_LocalModuleConfig_msg
 
 /* Maximum encoded size of messages (where known) */
-#define meshtastic_LocalConfig_size              440
+#define meshtastic_LocalConfig_size              442
 #define meshtastic_LocalModuleConfig_size        420
 
 #ifdef __cplusplus

src/mesh/http/ContentHandler.cpp

@@ -833,7 +833,7 @@ void handleScanNetworks(HTTPRequest *req, HTTPResponse *res)
             if (WiFi.encryptionType(i) != WIFI_AUTH_OPEN) {
                 JSONObject thisNetwork;
                 thisNetwork["ssid"] = new JSONValue(ssidArray);
-                thisNetwork["rssi"] = new JSONValue(WiFi.RSSI(i));
+                thisNetwork["rssi"] = new JSONValue(int(WiFi.RSSI(i)));
                 networkObjs.push_back(new JSONValue(thisNetwork));
             }
             // Yield some cpu cycles to IP stack.

src/modules/Modules.cpp

@@ -72,7 +72,8 @@ void setupModules()
             new AirQualityTelemetryModule();
         }
 #endif
-#if (defined(ARCH_ESP32) || defined(ARCH_NRF52)) && !defined(TTGO_T_ECHO) && !defined(CONFIG_IDF_TARGET_ESP32S2)
+#if (defined(ARCH_ESP32) || defined(ARCH_NRF52)) && !defined(TTGO_T_ECHO) && !defined(CONFIG_IDF_TARGET_ESP32S2) &&              \
+    !defined(CONFIG_IDF_TARGET_ESP32C3)
         new SerialModule();
 #endif
 #ifdef ARCH_ESP32

src/modules/SerialModule.cpp

@@ -44,7 +44,8 @@
 
 */
 
-#if (defined(ARCH_ESP32) || defined(ARCH_NRF52)) && !defined(TTGO_T_ECHO) && !defined(CONFIG_IDF_TARGET_ESP32S2)
+#if (defined(ARCH_ESP32) || defined(ARCH_NRF52)) && !defined(TTGO_T_ECHO) && !defined(CONFIG_IDF_TARGET_ESP32S2) &&              \
+    !defined(CONFIG_IDF_TARGET_ESP32C3)
 
 #define RX_BUFFER 128
 #define TIMEOUT 250

src/modules/SerialModule.h

@@ -8,7 +8,8 @@
 #include <Arduino.h>
 #include <functional>
 
-#if (defined(ARCH_ESP32) || defined(ARCH_NRF52)) && !defined(TTGO_T_ECHO) && !defined(CONFIG_IDF_TARGET_ESP32S2)
+#if (defined(ARCH_ESP32) || defined(ARCH_NRF52)) && !defined(TTGO_T_ECHO) && !defined(CONFIG_IDF_TARGET_ESP32S2) &&              \
+    !defined(CONFIG_IDF_TARGET_ESP32C3)
 
 class SerialModule : public StreamAPI, private concurrency::OSThread
 {

src/platform/esp32/main-esp32.cpp

@@ -85,7 +85,6 @@ void esp32Setup()
 {
     uint32_t seed = esp_random();
     LOG_DEBUG("Setting random seed %u\n", seed);
-    randomSeed(seed); // ESP docs say this is fairly random
 
     LOG_DEBUG("Total heap: %d\n", ESP.getHeapSize());
     LOG_DEBUG("Free heap: %d\n", ESP.getFreeHeap());
@@ -178,6 +177,7 @@ void cpuDeepSleep(uint64_t msecToWake)
 
     Note: we don't isolate pins that are used for the LORA, LED, i2c, spi or the wake button
     */
+#if SOC_RTCIO_HOLD_SUPPORTED
     static const uint8_t rtcGpios[] = {/* 0, */ 2,
     /* 4, */
 #ifndef USE_JTAG
@@ -191,6 +191,7 @@ void cpuDeepSleep(uint64_t msecToWake)
 
     for (int i = 0; i < sizeof(rtcGpios); i++)
         rtc_gpio_isolate((gpio_num_t)rtcGpios[i]);
+#endif
 
     // FIXME, disable internal rtc pullups/pulldowns on the non isolated pins. for inputs that we aren't using
     // to detect wake and in normal operation the external part drives them hard.
@@ -200,7 +201,9 @@ void cpuDeepSleep(uint64_t msecToWake)
 
 #ifdef BUTTON_PIN
     // Only GPIOs which are have RTC functionality can be used in this bit map: 0,2,4,12-15,25-27,32-39.
+#if SOC_RTCIO_HOLD_SUPPORTED
     uint64_t gpioMask = (1ULL << BUTTON_PIN);
+#endif
 
 #ifdef BUTTON_NEED_PULLUP
     gpio_pullup_en((gpio_num_t)BUTTON_PIN);
@@ -210,7 +213,9 @@ void cpuDeepSleep(uint64_t msecToWake)
     // FIXME change polarity in hw so we can wake on ANY_HIGH instead - that would allow us to use all three buttons (instead of
     // just the first) gpio_pullup_en((gpio_num_t)BUTTON_PIN);
 
+#if SOC_PM_SUPPORT_EXT_WAKEUP
     esp_sleep_enable_ext1_wakeup(gpioMask, ESP_EXT1_WAKEUP_ALL_LOW);
+#endif
 #endif
 
     esp_sleep_enable_timer_wakeup(msecToWake * 1000ULL); // call expects usecs

src/sleep.cpp

@@ -61,13 +61,15 @@ void setCPUFast(bool on)
          *     all WiFi use cases.
          * (Added: Dec 23, 2021 by Jm Casler)
          */
+#ifndef CONFIG_IDF_TARGET_ESP32C3
         LOG_DEBUG("Setting CPU to 240mhz because WiFi is in use.\n");
         setCpuFrequencyMhz(240);
+#endif
         return;
     }
 
 // The Heltec LORA32 V1 runs at 26 MHz base frequency and doesn't react well to switching to 80 MHz...
-#ifndef ARDUINO_HELTEC_WIFI_LORA_32
+#if !defined(ARDUINO_HELTEC_WIFI_LORA_32) && !defined(CONFIG_IDF_TARGET_ESP32C3)
     setCpuFrequencyMhz(on ? 240 : 80);
 #endif
 
@@ -337,6 +339,8 @@ void enableModemSleep()
     esp32_config.max_freq_mhz = CONFIG_ESP32S3_DEFAULT_CPU_FREQ_MHZ;
 #elif CONFIG_IDF_TARGET_ESP32S2
     esp32_config.max_freq_mhz = CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ;
+#elif CONFIG_IDF_TARGET_ESP32C3
+    esp32_config.max_freq_mhz = CONFIG_ESP32C3_DEFAULT_CPU_FREQ_MHZ;
 #else
     esp32_config.max_freq_mhz = CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ;
 #endif

variants/ai-c3/platformio.ini

@@ -0,0 +1,8 @@
+[env:ai-c3]
+extends = esp32c3_base
+board = esp32-c3-devkitm-1
+board_level = extra
+build_flags = 
+  ${esp32_base.build_flags}
+  -D PRIVATE_HW
+  -I variants/ai-c3

variants/ai-c3/variant.h

@@ -0,0 +1,26 @@
+// #define BUTTON_NEED_PULLUP // if set we need to turn on the internal CPU pullup during sleep
+
+#define I2C_SDA 8
+#define I2C_SCL 9
+
+#define BUTTON_PIN 0
+
+#define USE_RF95
+#undef RF95_SCK
+#define RF95_SCK 4
+#undef RF95_MISO
+#define RF95_MISO 5
+#undef RF95_MOSI
+#define RF95_MOSI 6
+#undef RF95_NSS
+#define RF95_NSS 7
+
+#define LORA_DIO0 10 // a No connect on the SX1262 module
+#define LORA_DIO1 3  // a No connect on the SX1262 module
+#define LORA_RESET 2
+
+#undef GPS_RX_PIN
+#undef GPS_TX_PIN
+
+#define HAS_SCREEN 0
+#define HAS_GPS 0

version.properties

@@ -1,4 +1,4 @@
 [VERSION]  
 major = 2
 minor = 1
-build = 3
+build = 4