Arduino wire library stop2/2/2024 ![]() ![]() Possible fix (not tested): uint8_t SoftwareWire::endTransmission(boolean sendStop) Return(_transmission) // return the transmission status that was set during writing address and data Original: uint8_t SoftwareWire::endTransmission(boolean sendStop) That would be easy to fix, but only when the library files are copied to the project and it is done locally because that is probably not according to the I2C standard. The SoftwareWire can go slower.Īs it turns out, it does not give a STOP when the Slave did not ACK, but also not when the Slave accepts the data. The easiest way to prevent that STOP and use a lower frequency is a software I2C library. I think he found the lower limit of 32kHz for the clock. Meanwhile, I took a look at the blog, website and Github of He does awesome things, combining so many things (Arduino, 3D printing, KiCad, you name it). I tried to find how Adafruit does that, but I can not find it right now. Some sensors are offline when they are busy. LightMeter.If a Slave is sometimes offline, then there must be a timeout in the sketch to stop trying after some time. Uint16_t lux = lightMeter.readLightLevel() Īnother alternative is to keep the TwoWire object in a local scope so that it gets destroyed when you leave that scope - maybe with a special function for it: ![]() LightMeter.begin(BH1750::ONE_TIME_HIGH_RES_MODE,0x23,I2Clightmeter) So instead you have to use dynamic allocation to control it: TwoWire *I2Clightmeter ![]() But you can't do that with the way you normally define the object. The ESP32 system is set up so that if the TwoWire instance is destructed the I2C bus is released. However it means changing how you define your I2C object. There is a way of doing it that's ESP32 specific. ![]()
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