Search found 289 matches

by paulvha
Sun Dec 09, 2018 4:49 am
Forum: Wireless/RF
Topic: esp32Thing crashes.
Replies: 5
Views: 459

Re: esp32Thing crashes.

can you share the code you are using? An ESP32 (like the ESP8266) needs to be perform regular background tasks for onboard WIFI and BLE. If you have a waiting loop, you have to include yield() on a regular basis to prevent the watchdog to timeout and cause a crash. Also you remember the kind of mess...
by paulvha
Mon Dec 03, 2018 12:22 pm
Forum: SparkFun Product Questions
Topic: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?
Replies: 13
Views: 143

Re: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?

pin 0 and 1 on the shield are ALSO connected to the UART/USB connection. On the Arduino pin 0 and 1 are also connected to the USB (for Arduino). When you put the switch to HW, which you have to do to communicate using the UART/USB, you get a conflict. Make sure that Pin 0 and 1 are NOT connecting to...
by paulvha
Mon Dec 03, 2018 5:03 am
Forum: Wireless/RF
Topic: M6E-Nano Frequency Selection
Replies: 3
Views: 99

Re: M6E-Nano Frequency Selection

The antenna work is more details than I have worked on so far. The default hoptable for EU3 has indeed 4 entries by default: /reader/region/hopTable: [865700,866300,866900,867500] /reader/region/hopTime: 3975 The minimum quantization between the frequencies is 100Khz Lowest limit allowed is 865,600 ...
by paulvha
Mon Dec 03, 2018 4:32 am
Forum: Arduino
Topic: favicon
Replies: 1
Views: 124

Re: favicon

It is not part of the library. You will have to find a way to obtain the parameters that are send with a GET- command and then send it from the sketch.
by paulvha
Fri Nov 30, 2018 8:02 am
Forum: SparkFun Product Questions
Topic: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?
Replies: 13
Views: 143

Re: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?

OK.. got something that works, but make sure to read the comments. I have posted it on https://github.com/paulvha/ThingMagic/tree/master/SerialPassthrough. It has been tested against the standard demo.c example from the Mercury API, accept for the addition mentioned in point 2. This was running on U...
by paulvha
Thu Nov 29, 2018 2:24 pm
Forum: SparkFun Product Questions
Topic: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?
Replies: 13
Views: 143

Re: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?

I have build a sketch that set the reader to 38400 ( 9600 etc). However I do not see any data from URA coming to the Arduino. The URA tries to connect at different speeds, but none of them seems to work with the Arduino yet... more work needed
by paulvha
Thu Nov 29, 2018 9:52 am
Forum: SparkFun Product Questions
Topic: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?
Replies: 13
Views: 143

Re: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?

It is in the right direction, but this will not work yet. After reboot the RFID reader speed is in 115K speed and that does not work well for RX on softserial. So after start, you first need to check whether the speed is max 38400 (I don't advice a higher speed). if not, then connect on 115K with so...
by paulvha
Thu Nov 29, 2018 1:47 am
Forum: SparkFun Product Questions
Topic: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?
Replies: 13
Views: 143

Re: Using Mercury C API and Universal Reader Assistant with Simultaneous RFID Reader via Arduino shield?

use the serialpassthrough-sketch that is standard part of the IDE in examples/build-in examples/communication. You will have to set the speed.
by paulvha
Tue Nov 27, 2018 9:27 am
Forum: SparkFun Product Questions
Topic: SI7021, RPiZW, SMBus, python, IO error
Replies: 5
Views: 53

Re: SI7021, RPiZW, SMBus, python, IO error

good progress.

for super user acces, try to add yourself to the i2c group (e.g. when you are user paul) : sudo usermod -G i2c paul
by paulvha
Tue Nov 27, 2018 6:57 am
Forum: SparkFun Product Questions
Topic: SI7021, RPiZW, SMBus, python, IO error
Replies: 5
Views: 53

Re: SI7021, RPiZW, SMBus, python, IO error

what happens if you send a reset first : bus.write_byte(0x40, 0xfe)?
Have you tried an i2cget instruction and see whether that works : i2get -y 1 0x40 0xe0 w
do you have the right access- permission to access /dev/i2c-1?
by paulvha
Mon Nov 26, 2018 2:05 am
Forum: SparkFun Product Questions
Topic: Redboard & 3.3volt snsors
Replies: 6
Views: 173

Re: Redboard & 3.3volt snsors

it is indeed the same..The pin 14 and 15 have the same function as on the pro nano (just keep counting the pins, they did not include a pin-number) pin 14 on the schematics for the Redboard is GND (not VCC). Pin 15 is AREF (reference voltage for the analog input). Internally in the 328P processor th...
by paulvha
Sat Nov 24, 2018 1:44 am
Forum: SparkFun Product Questions
Topic: Redboard & 3.3volt snsors
Replies: 6
Views: 173

Re: Redboard & 3.3volt snsors

Why does the Redboard not has a 5V power supply? The processor will need that. You can power the 31855K also with 5V. The output of the board is NOT analog, but a SPI interface. Hence it should be connected to pin 10 to 13 (connecting the right points to each other). The hookup guide provides direct...
by paulvha
Fri Nov 23, 2018 10:16 am
Forum: SparkFun Product Questions
Topic: Redboard & 3.3volt snsors
Replies: 6
Views: 173

Re: Redboard & 3.3volt snsors

I am struggling to understand the question and thus to provide help. Normally a K TYPE Thermocouple provides output in the order of mV and need to have a separate amplifier (like the https://www.sparkfun.com/products/13266). The Redboard has a ATMEGA328P processor. The analog reading is in 10 bits. ...
by paulvha
Wed Nov 21, 2018 1:55 am
Forum: Wireless/RF
Topic: M6E-Nano Frequency Selection
Replies: 3
Views: 99

Re: M6E-Nano Frequency Selection

The region is a setting on the reader. Depending on where you are in the world, you MAY only use a specific frequency, which is made available for free, unlicensed use. The Nano, unlike some other readers that have fixed frequency set at ordering, has indeed a high flexibility in setting the frequen...