Thanks! Not a lot of variation in dop values, maybe needs two decimal places. Here is data for 3 different GPS units with external antenna.
Adafruit ultimate, 1 constellation
GPS Strong signals (> 25db): 10, Weak...
OK, I confirmed NativeEthernet lib supports UDP BROADCAST by using local networks broadcast IP adddress, e.g. 192.168.1.255. target MAC address on packet is 0xffffffffffff
IPAddress MyServer(192, 168, 1, 255);
...
Usually, for UDP broadcast you use the the broadcast IP address of your local subnet. For my home network destination UDP broadcast IP would be 192.168.1.255 (the 255 is the broadcast address for that class C network)....
Another thread https://forum.pjrc.com/threads/61581-Teensy-4-1-NTP-server discusses using a PID controller and GPS to discipline T4.1 clock/time. As usual changing temperature is the dominant factor affecting the T4...
multicast is more local-network-friendly than sending broadcasts to EVERY machine on your local ethernet. Here is sketch for wiznet but you can change the includes to use NativeEthernet....
I haven't tested teensy to teensy, but I have tested T4.1 to/from linux over 100mbs wired ethernet. The linux box sends 40 1000-byte UDP packets at 97mbs and T41 receives all 40 packets at 94 mbs (94.42 mbs 40...
I had problems loosing GPS lock when powering up T4.1+ethernet and using an Adafruit ultimate GPS. I finally bought an external antenna and placed the antenna on windowsill. see thread ...
Maybe not. the multiple satellites are from different constellations, i think the gps solution probably uses no more than 12 satellites, though it's able to choose from a larger collection of strong signals.
Nice. Here is graphic data from T4.1 connected to sparkfun GNSS NEO-M9N with external antenna mounted on windowsill. M9N can use up to 4 constellations (GPS, GLONASS, Galileo, BEIDOU).
PPS To GPS: 134 ms...
Earlier posts on light-sensing with LED,
https://forum.pjrc.com/threads/40001-LED-as-a-light-sensor
https://forum.pjrc.com/threads/28407-Teensyduino-access-to-counting-cpu-cycles?p=116332&viewfull=1#post116332 LED RNG
I ran your 3 timer sketch, feeding pins with 10khz from analogWrite() on pin 8. The low order digits from the three counters seem to match
29433
29433
29433
31433
31433
31433
The teensy core uses TMR1 CH0 for PWM, so it pre-configures some of the registers. You need to clear a couple more registers, try adding line in RED
...
TMR1->CH.CTRL = 0; // stop
TMR1_SCTRL0 =...
You could define BMP3XX_DEBUG in the Adafruit_BMP3XX library, and it should print out progress in performReading() that might help you locate the problem. Since the Teensy 4 is so fast you might look for places in the...
In DCP_HASH_Update() change declaration line to read: size_t blockSize = DCP_HASH_BLOCK_SIZE;
and for test string of 64 bytes sketch returns 241003f8
(github updated)
The T4 hardware CRC is very limited, 32-bit fixed polynomial. It also has the flaw that input must be multiple of 4 bytes (it willl pad with nulls, if not), see
https://community.nxp.com/thread/506478
The SDK CRC...
FWIW, some GPSDO discussion and temperature issues in disciplining a T4 clock https://forum.pjrc.com/threads/61581-Teensy-4-1-NTP-server
As a proof of concept, here is a sketch that uses an external 8mhz GNSS GPS...
I've run both the torchframe sketch and the torch sketch (github), with 8-LED stick on pin 11 of T3.2. I have nothing else connected (no buttons, no IR receiver, nothing on A0 and A1). The torch sketch dimly lights...
How about trying the simple FastLED bllink example, testing with various values for NUM_LEDS. Following works for me with 8-LED neopixel stick on pin 11 with 3.3v and GND from T3.2.
#include <FastLED.h>
// How many...
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