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I was excitged to see a larger display but just throwing a link over that wall to a drawing is not useful to most of us. 1. are the libraries to drive this display? 2. is there a recommended / required communication path between Teensy and RPI? 3. Are there examples in getting this display to work?

Glad you found my lib useful. One of my goals in life is to have my name on a building before I leave this world. That is not going to happen, but this is a good alternative.

It's not real clear to me which devive initiates the coversation. In loop it "listens" but just once, then sends. I'm not sure there is ample listen time--at least that's what I see. I have a similiar system in my house where a base communicates wirelessly with sensors around the house. The...

Agree on above, also send as little data as possible. There are some tricks you can do to trim data. For example I measure outdoor temperature, which is stored as a float which takes 4 bytes (32 bits), but I don't need 5-6 decimals of precision. I'll make a decision on how much precision and how...

I leave mine at the default 9600, but I'm only sending 80 bytes or so every second. Some things I've found to get longest range 1) slowest air data rate possible, 2) max transmit power 3) min of 3.5db antennas EBYTE has these Where will your antennas be located?

I use these things all the time such as my home monitoring system. EBYTE also offers a 30db unit EBYTE E220-90T30D that will give more range. Caution, you cannot power these from the onboard power regulators, you must power them from an external source.

This may be a long shot, but a common issue causing with these LCD's causing white screens is the reset line. I see you are pulling it low in setup. Looking at how other libs handle the reset is by cycling it with some delays. ... if (_rst < 255) { pinMode(_rst, OUTPUT)...

1. Are you only using the ESP's for communications through your network? Could the units be connected wired using Ethernet (or is wireless a requirement) 2. Or are you trying to use the ESP's just for wireless between the Teensy's, meaning if you could communicate Teensy to Teensy using a...

Thanks for sharing. Used this utility to make a very very very cheap oscilloscope.

After days of debugging I’ve found my issue is not with memcpy. I initially thought it was since often the convert from a float to bytes would give 255 255 255 255. Even simple bit shifting to convert a uint165_t would give 255 255--at least that were the saved bytes to the flash chip. After...

I would recommend starting with getting just one device working--say the SD card. There are several YouTube vids and examples search "sd card pinout arduino" There are also good libraries with examples for SD cards Sd_fat is my go to. The add a second device, and go from there.

I'll some more detail, but I powered down my 4.0 for a few hours and upon restarting, it seems to be working. I've noticed this, that after several hours of usage, the problem returns. This will be a pain to debug.

All, I have a datalogger project based on a Teensy 3.2 that uses a database library to save telemetry data to a flash chip. Over they last 3 years, I've logged > 100 MB of data and have never lost a single bit. The driver can save a wide variety of data types. I've converted my project to a...

Correction : Above I said to use pin 23 for the signal with a 4.0 but it’s pin 22.

Here is the library. I took the examples right out of the box and implemented them in my code. https://github.com/PaulStoffregen/FreqMeasure

I have tried a similar approach in the past with very poor success. I always ran into bounce issues, amongst many other issues. I finally found a winning solution. Maybe this will work in your case. 1) I had to get off the LED or infrared,sensors and move to a magnetic one, I can give you a...

You need to get the latest lib. Amongst some fixes, I've added a routine to calibrate the display touch coordinates.

Keypad lib for the Adafruit display lib has been updated fixed to run on a Teensy 4.0.

Library fixed. I've made some internal changes as well to reduce memory consumption and speed things up. The init for the number pad includes and extra parameter. I would recommend deleted current installs of the ILI9341_t3_Keypad and getting the latest at...

What display lib are you using? The keypad you are trying to use is for the Adafruit_ILI9341 driver. If you are using the ILI9341_t3 driver, you need to use https://github.com/KrisKasprzak/ILI9341_t3_Keypad

I tried your .ino on a Teensy 4.0 Arduino IDE 2.3.2 Teensyduino 1.57 ILI9341_t3 that delivers with Teensyduino Add default compiler settings (600 mhz/faster) using an ILI9341 with these 3 sizes: 2.2", 2.4" and 2.8" All displays show a red background with text properly drawn Not sure what the...

Note some of these exist, but I’m thinking Teensy branded, and with dedicated libraries. Flash chip memory board a Winbond is fine but some board we can plug into PCB or solderless ADC expansion board (8 inputs) Offer low cost 12 bit board Offer precision 16 bit board Must have tri-state...

post a pic of your screen? I've got a lib that draw cartesian graphs--it may help.

@h4yn0nnym0u5e and @jmarsh Full marks! I was able to leverage the code to solve this issue.

not sure why my copy/paste lost the first set of records. Here's the full record set. Address: 0, Record: 0 - 35-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255-255- Address: 35, Record: 1 -...

All, thanks for jumping in. A bit more detail. My chip is the W25Q64JVSSIQ I saw that part about page boundaries. however my write errors are very random. After a full erase and writing 150 records. Oddly I don't get a fail every 256-byte writes. But when it does fails seem to happen at the...

Writing to the Windbon flash chip All, I have a library to write to the Teensy approved Windbon chip and to date has been 100% reliable in writing/reading data. I'll estimate I've written some 100 mb and have not lost even 1 bit. My library writes byte-by-byte and NOT arrays or bytes in...

What a great project. The UI is a work of art and the idea is stellar. I was about to do the same for my car--capture performance parameter and GPS and log to an SD card so driving/racing can be played back. I was going to build and sell. Then... The thought of plugging some test hardware...

Any chance on giving a synopsis?

All, What is the feasibility of transmitting say 50 bytes of data each second for approx. 90 minutes where the receiver is reading data “nearly real time” meaning a second or so of latency is acceptable? I have a telemetry system for race cars (30 mph) and I'm currently transmitting data from...

OK I'm in the same boat. Initially I had a Teensy 4.1 with 3v3 connected to the 3v3 on the Teensy (before I knew you should not do this). All was fine thought. The cutting the VUSB pad powering via 5v0 in the VIN. Eventually The board could no longer be programmed. No lights, no connected port...

@AlexBettsUTAS Thanks for the code and hardware tips!. My ADC's fired right up. You being able to decipher that data sheet gives you super genius status. I looked through your code and the data sheet and still cannot figure out how you got it working. I was able to hack a few settings to get...

Thanks for the code and tips, I'll look into this.

@AlexBettsUTAS That is great news. I'll surely give that a try. If you don't mind giving me your source, that would help tremendously. You can just pm it to me. Thanks a million.

KenHahn, Thanks for the feedback. I'm thinking of doing the same. A 5V0 regulator will power just the Teensy (via VIN) and a few sensors that require it, and that same regulator will feed another DC to DC to get 3V3 for the other sensors, display, etc. I've just bought these thinking they...

All, I'm in the process of redesigning a project, moving from a Teensy 3.2 to a 4.1. What is the best practice in powering a 4.1? I'm paranoid about overloading the onboard regulator as I have a bunch of sensors, display etc. drawing around 200 ma. I would really like to keep power supply...

DrM, thanks wiring up the 100 ohm resistor. answering your previous question key objectives are 1. add ADC to get more pins. I need 4-8 more and my have to move to a 4.1 but I'm trying to keep the PCB as small as possible. 2. SPI communication preferred. 3. Current Teensy analogRead with 12...

Thanks, I tried many clock times all the way down to 100 kHz, I'll try a 100 ohm. Data sheet said 10 ohm, but I'll try anything at this point.

OK this will be my last attempt at trying to get the MCP3564 working before I claim Microchip got the best of me :( It was suggested trying this lib (its the 4 channel version of the 8-channel MCP3564). This person built a dev board with a Teensy 4.1 so I think I'm close to getting this...

All, Thanks for helping out, a better schematic is. The author of the library has indicated the current code and apparently there are some issues with the library. It's been suggested I try a different lib. I considered writing my own but after looking at the data sheets programming section...

yea, tried that, and the series resistors, nothing helps. I looked at the low level spi call in the library where spi transfers are done and _spi->transfer returns 255 I really have no idea how to proceed. MCP3x6x::status_t MCP3x6x::_transfer(uint8_t *data, uint8_t addr, size_t size) {...

I'm having issues getting a reading from my MCP3564 chip. I have tried 2 chips no luck. Anyone have this working and have wiring and some code? I'm using the library https://github.com/nerdyscout/Arduino_MCP3x6x_Library One person has chimed in but still nothing is working. If I run the...

All, I have a Teensy 4.1 and I have a W25Q64JVSSIQ-ND soldered to the bottom (larger pads). If I run LittleFS, using the example LittleFS_Program_Simple_Datalogger.ino the chip is found and I can log some data to the chip. I have written my own database driver for such chips and when used with...

I have several applications that store user settings. I use the EEPROM all the time. I'm storing some 300 bytes and have never lost a bit. Not sure what you are trying to write but EEPROM.put and EEPROM.get let's you write data, and these functions write the necessary bytes based on what's...

I realize this is a complete direction change, but I have a similar system where I can monitor garage door state (open/close) and I can remotely open/close it. My method of monitoring is an ultrasonic distance sensor mounted near the top near the motor. It senses distance to the top of the door...

Probably not, this lib uses SPI calls to get/save data to the chip, and uses specific codes based on the chip.

very impressive.

All, I was experimenting with using analogReference and have yet to get anything reliable working. I have a Teensy 3.2 powered by a 3v3 buck converter and a 10uf + a 0.1 uf cap across A3 to ground. This setup is used for both analogReference on and off. My voltage applied to A3 is approx...

SOLVED No clue why this works today as I've tried this code in the past. Any way posting for others to use. sender code #include "Wire.h" #define I2C_DEV_ADDR 0x44 byte val = 0; uint8_t error = 0; struct DATA { uint8_t cat = 0; uint8_t dog = 0; }; DATA sender; void setup() {...

I have done something similar and displaying bar data on an ILI9341. See this vid at the 10 sec mark (7:00 as well) Code is here, but the display portion is at line 357 https://github.com/KrisKasprzak/SampleCode/blob/master/CanonMicProcessor_05.ino Mine is segment based but can be more...