Nokia Sl3 Logger Crack
Reney Shammo
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Most hookup guides assume that you can spare six control lines to run the display, which is not the case when your logger already has three indicator LEDs, I2c devices, one wire sensors and a couple of voltage dividers on the go. However if you are willing to add a few resistors and occasionally toggle the power, you can bring that down to three wires and a power pin.
This software SPI method (originally from arduino.cc?) requires no library at all, and shiftout commands work with any combination of digital pins; saving those hardware SPI lines for more important jobs.
But I had something else in mind, since I wanted to power the entire display from a digital pin because the power draw with the display off is still about 70uA. This accumulates into a significant amount of wasted power over a multi-year deployment.
This gives you a way to perform a hard reset any time you want provided you tie the screens RS line to that switched power with a 4k7 pullup resistor, and re-run the initialization sequence after restoring power.
I had a project that needed some live data display, and looking for the cheapest low-power solution for our loggers lead me to the Nokia 5110 LCD. Once you get the backlight current under control, you can power the entire display from a digital pin, and if you use shiftout for soft SPI you can then get rid of the Reset and CSelect control lines. This brings the display down to any four wires you can spare on your build (incl. the power pin) and a ground line. This is much more manageable than what you see with the standard hookup guides if your mcu is I/O limited like our pro-mini based loggers:
They are in my experience of very questionable reliability and if your application does not require the display to be read in direct sunlight I would use something like on of the SSD1306 OLEDs, they are 4 wire too.
Those OLEDs are great looking displays. I will probably use them on any instruments that only see operation for short periods (like during a dive). I'm wondering if they might handle the pressure of being under water better as well?
I can't imagine they would be any less competent than the 5110, simply by virtue of being more modern. I imagine they only need be turned on for as long as they are being read, so I don't see a power problem.
What is the directory "debuglogger" (/storage/emulated/0/debuglogger) for and how to completely remove it? In a week it uses almost 5% of my phone's memory. I have to delete it manually to free space, but it creates itself again in seconds.
RaceChrono is a versatile lap timer, data logging and data analysis app designed especially for use in motorsports, replacing your traditional lap timers and data loggers. The RaceChrono Pro app also enables you to record videos and overlay them with the logged data.
In the center picture above, the proto board has the voltage and current circuit from the Mains AC energy monitor. The +5v, ground, voltage and current signals are connected into the data logging shield current to port P5 and voltage to port P6 (pdf here). I am using a 100A sensor (here). The LCD (enlarged in right picture above) is displaying from top to bottom: real power, appent power (almost the same as the watt meter which is enlarged in the left picture above), power factor, voltage (US 120V), current, date and time stamp. The data logging shield has a real time clock built in. To the right most edge of the data logging shield, an SD card is plugged in and data is logged in csv (comma seperated value format) file (see picture below). See attached file below for the source code. The main loop goes throgh a sequence of getting the time stamp, measuring power, sending data to serial output (USB port to computer), sending data to SD for logging, sending data to LCD. This sequence is repeated forever. When power up, it will wait for an SD card to be inserted. After the SD card is instered, there is currently no way to stop data logging or read SD card data from the arduino. Data is currently viewed from a computer. I used the offical arduino SD library built into arduino software here, the DS1302.h file for real time clock here, the nokia lcd library here, and the emon library here. I got the double to string conversion here. Note that this is my first time getting two SPI device working at the same time (SD & LCD). If you know of a better way to do it please post.
On my pc, I use the emoncms database. Every day a task gets the csv file (from base station over ethernet), convert it to emoncms rows and insert the new entries in emoncms. I also have written some graphs in JPgraph to follow my energy use.
My experience with several devices on the same SPI bus:
when accessing the ethernet device (fe. send over a 30 MB csv file to the client pc), the mega hangs when receiving on the same time a RF pakkage. (it rarely happen, once a month), but is annoying. As it is a Mega2560, the internal WDT won't work and there are no alternative bootloaders yet available.
Please could you could share your code and maybe a photo or two? I will then create a page for it in the build examples section. It would definatly be usefull to others. Or it would be fantastic if you did it yourself, this whole site is an editable wikki.
I'm having some issues with EmonLib and SD (on the official Arduino Ethernet R3 Shield). It seems that there is some incompatibility between the EmonLib and the SD library. If I have any reading bigger than zero (ground) on the analog input and I try to use the SD on the same time the Arduino resets. Things go fine if reading is zero or if I'm not using the SD (sd card is not inserted).
in the link below is my AC watt meter non invasive, which I follow the code from this site. IT can write data to SD Card modul, then we can extract data to excel to graph it. I dont have time to make instructions because it depend on your modul, library. But you can search the code on internet.
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