I2C 2 not properly working on ESP32

[Ellerbach]

Library/API/IoT binding

System.Device.I2c

Visual Studio version

No response

.NET nanoFramework extension version

No response

Target name(s)

ESP32 REV 0 without PSRAM

Firmware version

1.8.0.6

Device capabilities

System Information HAL build info: nanoCLR running @ ESP32 built with ESP-IDF v4.4 Target: ESP32 Platform: ESP32

Firmware build Info: Date: Apr 1 2022 Type: MinSizeRel build, chip rev. >= 0, without support for PSRAM CLR Version: 1.8.0.6 Compiler: GNU ARM GCC v8.4.0

OEM Product codes (vendor, model, SKU): 0, 0, 0

Serial Numbers (module, system): 00000000000000000000000000000000 0000000000000000

Target capabilities: Has nanoBooter: NO IFU capable: NO Has proprietary bootloader: YES

AppDomains:

Assemblies: Test2I2cSameTime, 1.0.0.0 System.Device.Model, 1.1.0.0 Iot.Device.Am2320, 0.0.0.0 UnitsNet.RelativeHumidity, 4.128.0.0 mscorlib, 1.12.0.4 System.Device.I2c, 1.0.3.3 nanoFramework.Runtime.Events, 1.10.0.3 UnitsNet.Temperature, 4.128.0.0 System.Buffers.Binary.BinaryPrimitives, 1.1.0.0 nanoFramework.Hardware.Esp32, 1.3.6.3

Native Assemblies: mscorlib v100.5.0.17, checksum 0x004CF1CE nanoFramework.Runtime.Native v100.0.9.0, checksum 0x109F6F22 nanoFramework.Hardware.Esp32 v100.0.7.3, checksum 0xBE7FF253 nanoFramework.Hardware.Esp32.Rmt v100.0.3.0, checksum 0x9A53BB44 nanoFramework.Device.OneWire v100.0.4.0, checksum 0xB95C43B4 nanoFramework.Networking.Sntp v100.0.4.4, checksum 0xE2D9BDED nanoFramework.ResourceManager v100.0.0.1, checksum 0xDCD7DF4D nanoFramework.System.Collections v100.0.1.0, checksum 0x2DC2B090 nanoFramework.System.Text v100.0.0.1, checksum 0x8E6EB73D nanoFramework.Runtime.Events v100.0.8.0, checksum 0x0EAB00C9 EventSink v1.0.0.0, checksum 0xF32F4C3E System.IO.FileSystem v1.0.0.0, checksum 0x3AB74021 System.Math v100.0.5.4, checksum 0x46092CB1 System.Net v100.1.4.1, checksum 0xA01012C3 Windows.Devices.Adc v100.1.3.3, checksum 0xCA03579A System.Device.Adc v100.0.0.0, checksum 0xE5B80F0B System.Device.Dac v100.0.0.6, checksum 0x02B3E860 System.Device.Gpio v100.1.0.4, checksum 0xB6D0ACC1 Windows.Devices.Gpio v100.1.2.2, checksum 0xC41539BE Windows.Devices.I2c v100.2.0.2, checksum 0x79EDBF71 System.Device.I2c v100.0.0.1, checksum 0xFA806D33 Windows.Devices.Pwm v100.1.3.3, checksum 0xBA2E2251 System.Device.Pwm v100.1.0.4, checksum 0xABF532C3 Windows.Devices.SerialCommunication v100.1.1.2, checksum 0x34BAF06E System.IO.Ports v100.1.4.0, checksum 0xCB7C0ECA Windows.Devices.Spi v100.1.4.2, checksum 0x360239F1 System.Device.Spi v100.1.1.0, checksum 0x3F6E2A7E System.Device.WiFi v100.0.6.3, checksum 0x5C9E06C4 Windows.Storage v100.0.2.0, checksum 0x954A4192

++++++++++++++++++++++++++++++++ ++ Memory Map ++ ++++++++++++++++++++++++++++++++ Type Start Size ++++++++++++++++++++++++++++++++ RAM 0x3ffe49ac 0x0001b000 FLASH 0x00000000 0x00400000

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++ Flash Sector Map ++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Region Start Blocks Bytes/Block Usage +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 0 0x00010000 1 0x1A0000 nanoCLR 1 0x001B0000 1 0x1F0000 Deployment 2 0x003C0000 1 0x040000 Configuration

+++++++++++++++++++++++++++++++++++++++++++++++++++ ++ Storage Usage Map ++ +++++++++++++++++++++++++++++++++++++++++++++++++++ Start Size (kB) Usage +++++++++++++++++++++++++++++++++++++++++++++++++++ 0x003C0000 0x040000 (256kB) Configuration 0x00010000 0x1A0000 (1664kB) nanoCLR 0x001B0000 0x1F0000 (1984kB) Deployment

Deployment Map Empty

Description

Trying to use both I2C busses on ESP32. Whatever setup is done with the pins, for the exact same sensor connected on both busses, only the one connected on I2C1 will work. The one on I2C2 will never work. Simple code:

            Debug.WriteLine("Hello from nanoFramework!");
            Configuration.SetPinFunction(12, DeviceFunction.I2C1_DATA);
            Configuration.SetPinFunction(14, DeviceFunction.I2C1_CLOCK);
            Am2320 _dhtIn = new(new I2cDevice(new I2cConnectionSettings(1, Am2320.DefaultI2cAddress)));
            Configuration.SetPinFunction(21, DeviceFunction.I2C2_DATA);
            Configuration.SetPinFunction(22,DeviceFunction.I2C2_CLOCK);
            Am2320 _dhtOut = new(new I2cDevice(new I2cConnectionSettings(2, Am2320.DefaultI2cAddress)));

            while(true)
            {
                var tempIn = _dhtIn.Temperature;
                var humIn = _dhtIn.Humidity;
                var tempOut = _dhtOut.Temperature;
                var humOut = _dhtOut.Humidity;
                // Both should be true!
                Debug.WriteLine($"In: {_dhtIn.IsLastReadSuccessful}, out: {_dhtOut.IsLastReadSuccessful}");
                Thread.Sleep(5000);
            }

What has been tried:

• changing the pins from I2C1 to I2C2. All pins work fine even when switched.
• changing the sensors, both works fine.

How to reproduce

Run the previous code with 2 identical sensors on each I2C bus

Expected behaviour

Having a working I2C2 bus

Screenshots

No response

Sample project or code

See in description

Aditional information

No response

[josesimoes]

What's the module (hardware) you're using?

[Ellerbach]

What's the module (hardware) you're using?

As per the sample provided:

Am2320

[Ellerbach]

I have about 10 of them, so I've changed them few times, I swap in the code the I2C1 and I2C2 pins, whatever the combination is with 2 proven to work sensors, I always get only the one on I2C1 working, never the one on I2C2

[josesimoes]

Apologies for not being clear: I was asking about the ESP32 module 😁

[Ellerbach]

Apologies for not being clear: I was asking about the ESP32 module 😁

ESP32_REV0 is the image :-) The module is a basic ESP32 without PSRAM, the very classical ones.

[Ellerbach]

So it now seems to work fine with the default pins. Will check with different pins

[Ellerbach]

So all seems to work fine again. Not sure what was happening. Adjusting the pins works fine as well. Multiple sensors on the same bus works fine as well. Maybe the migration to IDF 4.1.1 helped So closing this issue.