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Topics - MachAngle

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    I tried modifying the sample TinyGPS shield sketch to write the encoded NMEA sentence to a file on a microSD card.  I think the problem is in the modified smartdelay routine that never finds a satellite fix....or a valid NMEA sentence.  Hardware I am running:
    TinyScreen+ processor
    TinyGPS Shield modified to have chip select pin set to 8
    Tiny SD microSD shield

    Anyone see the problem?

General Discussion / Micro SD Documentation
« on: March 15, 2018, 11:24:30 PM »
    Could you verify the MicroSD pin documentation posted on you web site matches the hardware implementation?   I think I read that the CS data line in the SPI interface should be unique to the individual device and the shared data lines (MOSI, MISO, and SCLK) should be connected to the same pins of when using multiple SPI devices?  Looking at the Tiny Circuits Micro SD shield documentation, I noticed that pins 11 (labeled SCLK) and 13 (labeled MOSI) are swaped relative to the documentation for the Nordic BLE, BLE St, WiFi, and other communications shields in the Tiny Circuits store.  If the MicroSD documentation is correct, then I think it means the MicroSD shield is not compatible with the other SPI devices.

General Discussion / TinyScreen+ SmartWatch Compile Error
« on: February 15, 2018, 09:11:30 AM »
I tried to compile the standard TinyScreen Smartwatch sketch on the Learning website without success.  After much searching through the forum, I found Ben Roses sketch enclosed in a reply to a person having similar difficulty.   The header in Ben Rose's sketch identifies the version as:

//  TinyCircuits TinyScreen+/NRF8001 Smartwatch Example Sketch
//  Last Updated 3 March 2017

Is there a latter version somewhere? When I compile it I get the following compiler error:

F:\TinyDuino\TinyScreen_Smartwatch\TinyScreen_Smartwatch\TinyScreen_Smartwatch.ino:25:21: fatal error: RTCZero.h: No such file or directory

 #include <RTCZero.h>


compilation terminated.

exit status 1
Error compiling for board TinyScreen+.

New Product Ideas / Universal Modular Sketch Template
« on: January 28, 2018, 11:31:42 AM »
Hey!  You used compiler directives to make your sketches compatible with your processor boards.  Why not use compiler directives to activate portions of a "universal" sketch of all tiny circuit shields that can be toggled using compiler directives based on the users tiny circuit configuration.  It sure would be easier for us to customize and would solve compatibly issues right out of the box!

New Product Ideas / Lidar Lite v3 Tiny Circuit
« on: January 28, 2018, 11:04:09 AM »

General Discussion / TinyScreen+ Nordic BLE Paring Error
« on: January 14, 2018, 10:52:26 AM »
     I have a TinyScreen+ and a Nordic Bluetooth Low Energy TinyShield in my stack. I successfully compiled and am trying to run Ben Rose's "TinyCircuits NRF8001 UART Example Sketch updated" 27 May 2016 on the TinyScreen+

The only device I did not recognize in the Bluetooth setup on my android phone is named "URT". When I try to pair to the device named "URT" on my cellphone it says "Unable to communicate with URT".

I had a strange problem with the Ardunio IDE standard Serial Terminal flip-floping between COM 9 and COM 10 identified for the TinyScreen+ when the code was uploadig.

When I am successful uploading the code, the "standard" Serial Monitor from IDE outputs:

Evt Connected
Evt Pipe Status
Evt Disconnected/Advertising timed out
Advertising started

when set at either 115200 and 9600 baud rates.

Any idea what is going on?

New Product Ideas / ArduPilot Flight Control System
« on: December 17, 2017, 09:10:35 AM »
I want an all TinyCircuit AuduPilot compatible flight control system for my quadcopter drone!  see

New Product Ideas / Upgradeable GNSS shield
« on: December 17, 2017, 09:05:48 AM »
Many of the GNSS solution providers like UBLOX and Telit have families of devices with the same pin-outs and form factors supporting various features.  In the case of Telit the SL869, SL869-V3, SL869-ADR, and SL869-3DR.  UBLOX has the neo-5, -7, and -8 generations of families that are pin=compatible upgrades.  Personally, I am interested in Untethered Dead Reckoning (UDR) as implemented in the UBLOX Neo-8U and the Telit SL869-3DR; and RTK as implemented in the UBLOX neo-8T.  It would be cool for TinyCircuits to offer an upgradeable GNSS shield using one of these pin-compatible GNSS families...especially if you implemented the shield with a socket so it could be tailored by the customer for their application!

User Projects / Code Examples / Use UBLOX NEO-m8N with TinyDuino?
« on: March 19, 2017, 02:51:35 PM »
Let me start out saying I am a NewBee.  I am trying to build a GPS-IMU logger for the hotshoe of my camera.  Has anybody successfully connected the Tinyduino to a Ublox NEO-M8N GPS Module from a UAV?


I connected the GPS module to the following pins of the tinyduino protoboard:

Proto -> GPS
A0 -> RXD
A1 -> TXD

     My understanding is that the Compass is connected through the SCL and SDA pins....GPS through RXD and TXD. 

     I am trying to use the sketch from the TinyShield-GPS that uses the TinyGPS++ object.  Code compiles and loads but can't wake up the UBLOX NEO-M8N. 
     I swapped out the UBLOX with the TinyGPS shield and it works.  I have not figured out how to connect the UBLOX NEO-M8N to the UBLOX u-Center v8.24 using TinyDuino hardware.

     Any help out there?

New Product Ideas / RTK Upgrade for TinyGPS
« on: February 04, 2017, 12:39:30 PM »
I would like to see a bigger active patch antenna sized to the Tinydurino form factor for better signal quality.  Ugrading to a RTK capable GPS chip like the U-BLOX NEO-M8P or the SkyTraq S2525F8-BD-RTK to enable 1cm RTK accuracy.  Firmware should be compatible with RTKlib implemented on PCs and Android devices.  Having a project tutorial that combines the output of the GPS shield and the 9DOF shield using a kalman filter and a dead reckoning algorithm would help solve the gps signal quality issue.  The WiFi shield, or Bluetooth shield, or a new cellular modem shield would enable connection between the TinyRover and Base stations on android phones or cellular networks.

New Product Ideas / Stackable Modular case
« on: February 04, 2017, 12:13:48 PM »
make rectangular case that fits between or individual tinydurino shields for a more finished look and keep dirt out.  Could be designed to replace screws by snapping together.  Might consider a bottom and top caps.  caps could be the mechanical interface for other devices like camera hotshoe or GPS antenna domes

New Product Ideas / 38Mpix TinyCamera
« on: February 04, 2017, 12:06:42 PM »
Check out this surplus camera component on eBay:

Note the ribbon connector looks similar to that on the will probable be different, and software drivers may be an issue.

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