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Did you apply the 2 changes I proposed above? Without those, the circuit will definitely not work. With respect to the 10K resistor on pin 8: it does not matter whether it's 10K to GND or directly to GND, since the internal pullup is typical 1.1MΩ and thus the STBY signal will be considered LOW...

Signal integrity could be playing a role here. CAN FD has a much higher datarate and thus higher frequencies on the cable. I would like to suggest short wires between parts and twist the CANL & CANH wires like in an Ethernet cable. Paul

If you indeed use the Waveshare board mentioned above and replaced the SN65HVD230 chip by the MCP2562FD chip, you need to connect its 3.3V header pin to Teensy Vin pin: and connect a separate wire from pin 5 of the MCP2562FD to Teensy pin 3V3. For reference, this is the schematic of the...

Yes

By the way, did you connect the Vdd pin of the MCP2562FD to 5V or 3V3? The chip is supposed to be powered by 5V: Since the Teensy 4.x I/O pins are 3V3 only, Vio needs to be 3V3. Paul

Page 5 of the MCP2562FD datasheet states: So you need connect the Vio pin to the Teensy 3V3, otherwise you won't have working TX & RX signals. Similarly, you need to check whether the STBY pin is connected to GND for normal operation: Paul

So you only replaced the SN65HVD230 chip by the MCP2562FD chip? You may want to check the datasheets since the MCP2562FD is not pin-compatible with the SN65HVD230. Pins 5 & 8 are different. E.g. the Vref pin on the SN65HVD230 is an output while Vio on the MCP2562FD is the Digital I/O Supply...

Which CAN FD module are you actually using? From the picture above, it looks like the Waveshare SN65HVD230 CAN Board, which is not CAN FD capable. Paul

Yes, there are so many rotary encoders out there that knowing which one is mandatory. You may want to have a look at this thread and this thread for using rotary encoders with NPN output stage. Paul

Looking further into the Snooze libary, I ran into the SnoozeUSBSerial example. Apparently you can use USB Serial output but it's not a wake-up source. So the USB interface is actually active in Sleep mode. Forum member @duff might be able to tell more... Paul

I'm not 100% sure, but isn't the USB interface inactive while in Sleep mode? Paul

You may want to open an issue at https://github.com/RobTillaart/ADC08XS/issues. Rob Tillaart is very responsive and actually this current issue might be relevant to you. Paul

Line 7 of the example states Supported Micros: T-LC/3.x. Since the writer of the Snooze library is also a forum member here, you could try to PM him @duff . Paul

I'm wondering what library you are actually using. Ah, I think you are using the AudioSynthSimpleDrum class from the Audio library. Like Pete said, please post your code. Paul

From the K64 datasheet: My recommendation would be: if can you run at 100Mhz, do so - it lowers the overall powerconsumption and perhaps it improves reliability. Paul

Since you are mentioning Ethernet, I assume you are talking about the Teensy 4.1, correct? For a 100pcs series, I would consider using low-profile IC sockets like this: You would need to purchase the Teensy 4.1 with soldered pins and Ethernet chip then. For the Ethernet signals to be fed out to...

Yes, the sending Teensy is perfectly capable of driving the on-board LED on the receiving Teensy, so there are no problems to expect with respect to reliability. The same applies the other way around: a Teensy outputting a digital signal on pin 13 (and thus lighting up its onboard LED) will...

@AussieBruce You may want to consider purchasing BusBoard breadboards. I used to use breadboards that you can buy everywhere but have seen the same problems you described. But when I threw away all those cheapo breadboards and purchased a bunch of BusBoards never had any problems since...

Maybe these pages will help you to decide how to connect the Amazon boards: All you need to know about TRS MIDI connections and A simplified guide to TRS MIDI. Paul

I think you only need to replace the bootloader chip, and not the IMXRT microcontroller & not the flash memory chip because you started with an empty bootloader chip. I assume that nothing has paired yet. From the bootloader page: But I would like @PaulStoffregen to confirm. Paul

Well, glad you found that! If you want to check for MIDI output, this online tool may be useful as well. Paul

Insert a Serial.println(n1); to check the analog reading, like so: if (msec >= 20) { msec = 0; int n1 = analogRead(A1) / 8; //CC 11, expression Serial.println(n1); // insert here if (n1 != previousA1) { usbMIDI.sendControlChange(controllerA1, n1, channel)...

This thread & thread may be helpful. Paul

As far as I understand it, you won't be able to get a compatible cloned Teensy board. Remove your chip and replace it with a chip purchased from PJRC. Paul

The bootloader chip @KurtE referred to, must be a PJRC-programmed version. If you purchase the chip from PJRC [this one for Teensy 4.1], it is programmed with the required functionality. Paul

What kind of keyboard are you meaning, a QWERTY or MIDI keyboard? Indeed, a Teensy doesn't have a physical MIDI port - you have to add that to the Teensy as explained here. Paul

Not really a driver but this is the code I used successfully an a Teensy LC: #include <SPI.h> // pin 13 (SCK), pin 11 (MOSI), AD9833 generator #define FSYNC 10 // pin 10 (SS) #define SPI_CLOCK_SPEED 12000000 // 12MHz SPI clock unsigned long MCLK =...

In the schematic, I only see a diode between VCC and the input of the 5V regulator? What is VCC actually? 12V? Is the output of the regulator indeed 5V as intended? Paul

I'm a bit confused: you stated "As soon as I plug in the power, the light immediately turns off and it no longer shows up on ArduinoIDE". So did the Teensy show up in the Arduino IDE when only USB was plugged in? Paul

So when it's powered by USB only, Teensy is working fine? The display doesn't show of course. I assume you cut these pads and placed a Schottky diode: Can you share a photo of this placed diode? Paul

One of the important differences between Teensy 3.2 and Teensy 4.0 is that the pins of a Teensy 3.2 are 5V tolerant. Teensy 4.0 pins are definitely not 5V tolerant. Could it be this is at play? Looking at the schematic I would say this is not applicable though. What exactly happens when "it...

A "Compilation error: exit status 1" could be caused by a lot of different issues. You may want to switch on full verbose output in the Preferences window: And then share what you see in the Output window. Interestingly, your code compiled fine on my machine... Paul

You will need to connect a common wire from one side of each switch to the GND pin on the Teensy. The other side of each switch needs to be connected to an individual Teensy pin. Then use the pinMode(pin, INPUT_PULLUP); to pull the signal high when the switch is not pressed. When the switch is...

You're absolutely right, it's like this: Paul

Yeah, finally! Who would have imagined that by shifting the enable bit 1 position to the left makes the whole thing work... well, you did apparently! Sigh, so much for a correct datasheet. Are you going to feedback this to them or just be happy that it works? Oops, that's because I declared...

Hmm, strange results. Tomorrow, I will hookup my SK Pang LIN-Bus Breakout Board and check with the oscilloscope as well. With respect to the use of the CSS CL1000: I don't think it's usable since it is a CAN bus logger only. Paul

Hi Jordan, the fight apparently isn't over yet... I'm not sure what to think about the ID27 results. But first I would like to focus on sending data to the heater to get it running. Since he suggested this: I pulled the logic analyzer out and captured the 3 frames to the heater, using this...

Hi Jordan, that flowchart helped a lot to clearify. In the flowchart below I noted the register IDs in red. I skip reading out status register ID27 for now. So we have to write ID33 first , then ID22 and then finally ID22 again. Below the code that does that. I moved writing ID33 & ID22 to...

Hi Jordan, thanks for the new info. I will look into it over the coming weekend. Paul

"How to systematically learn Tensy 3.2 and code" Best to start with the tutorial. Paul

Like a kind of brute-force attack? Hmm, too many possible input combinations to my taste. And how to verify the output? What came to mind though is whether there is a requirement on how to apply the voltages timing-wise. Like 12V first to get the built-in MCU to boot & run and then apply the...

Agree, reading ID17 is not required for the heater to activate. I was hoping that only writing ID22 & ID33 would be enough to kick off the heater. Paul

I'm a bit lost though - I wonder if we are doing something fundamentally wrong in the LIN communication to the heater, because what we see doesn't make sense. Well, I do hope the supplier will come back with some sort of initialisation sequence or init code. Paul

That CRC: 104 is correct with both data bytes being 0x00:

I think CRC 255 means error?

ID33 is a really a 2 LIN data byte message. It's a typo from their side. From the specs: They probably better stop using the word 'byte'; we are talking 'registers' here with a certain bit length. What does "with a byte length of 3 bytes" actually mean?? Look at the confusing ID17...

Hi Jordan, Looked further into the odd/even number of databytes. Several sources [incl Wikipedia] state that the number of bytes must be 2, 4 or 8. However when studying the LIN 2.1 spec, no such requirement is there. So last night I contacted CSS Electronics about this and they replied this...

You may want to select a DS18B20 since the DS1820 is obsolete. Yes, see this tutorial. From a reputable source in your country. The latter sounds good. Paul

Hi Jordan, sorry, we cannot bypass the LIN roadblock. The heater only accepts LIN data for control... What the engineer stated is: "We execute PWM control through software, not through external low-voltage wire for PWM signal control". And then he writes out 4 points how the internal PWM...

From the answer of the engineer and re-reading the spec, my understanding is as follows: 1. We can not drive the heater by an external PWM signal. There is no analog or PWM pin available on the Low voltage connector. 2. Internally, the heater uses PWM to drive the IGBT's (power transistors). 3...