Pop Andrei Lucian

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  1. Hello people, I am interested in designing a cooler for OPI Zero and OPI LIte. Next is the formula of calculus: I am NOT able to find next parameters: T_Jmax = this is the DIE(microprocessor) wanted temperature ---> is this 30-40 degrees best temperature for OPI for well functioning in parameters? P_DMAX = power that is generated by the losses of OPI Zero board and OPI Lite board. Q_jc = thermal resistance between DIE(microcontroller) and case Can please someone help? Thanks.
  2. Hello, What do you mean by "drive strength can be changed per pin AFAIK" ?? If you have 20-40 mA on each pin and you have 17 GPIOs + 2 dedicated 3.3V pins ==> 380mA - 760mA on all pins (H2+ of OPI Zero) I can see from schematic that there is only one step down circuit for 3.3V ==> that the GPIOs current is spited between this 19 pins. e.g. I can power 2 pins with 60 mA / each ==> I will have 260 mA left not used. Am I right?
  3. Do you mean 20-40 mA output from all GPIOs pins in total ??? This is really really little. You may trigger only 2x20mA LEDs like this ?? Using all available GPIOs ??
  4. Hello, Sorry for late reply, I was on vacation for a while. I do understand my idea is not feasible with OPI devices. During reset faze I will have all my LEDs connected to GPIOs with high impedance state (Z) => Not glowing. After reset I will run some batch script that will start my C/Python applications which will handle all the LEDs as wanted. Thank you for all the support! One short question. Do you know what is the maximum current driven from 3.3 V pins of OPI Zero or OPI Lite (GPIOs set as output or that two 3.3V dedicated pin
  5. Sorry for getting confused, with green is initial OPI Zero GPIO values at startUp (reset time) Under OPI Zero (H2+) it looks that 2 of this pins have both OUT HIGH (wPi pin 0) and IN HIGH (wPi pin 9) Is there a datasheet present in order to check values from test with H2+ datasheet ones? (I see only fr H3)
  6. Thanks for such prompt notice !! I do understand now the meaning. Enlighten my way. But, Under OPI Zero (H2+) it looks that 2 of this pins have both OUT HIGH and IN HIGH No datasheet present in order to check the values. Or is there?
  7. Hello, Thank you for fast notice. "Where did you found OPiLite 1.2 schematic?" Under official website: http://linux-sunxi.org/images/4/4b/Allwinner_H3_Datasheet_V1.2.pdf At page 68 it is stated that GPIOs PC3 and PC4 are "Default pulled up" (at reset time). Also, when I run gpio readall I get next output => That all are zero alue with different ALT function at reset time (with yellow in picture) Am I making something wrong? I want to trigger a LED when the micro controller is on reset faze and until the software loaded on the sd c
  8. Hello, I am talking strictly about GPIO's value and mode at reset. Under "sudo gpio readall" of H3 core (OPI Lite) I can see that ALL GPIO pins are 0V with different alternative mode functions. Under H3 core (OPI Lite) datasheet 1.2 says that value PC3 and PC4 GPIOs are pulled up? This are in contradiction! Did anyone measured the H3 core GPIOs value? Does H3 core has any pin of pulled-up mode during the reset time of the controller? Please help.
  9. Hello, I am encountering problems when trying to setup AP on Opi Lite, using last Armbian update. I am using default wlan0 embedded wireless for default connection and Tenda W311MI (ra0) dongle for AP mode. I did configured everything in conformity with the post. Connection to internet via Router is working perfect using any whatever ra0 or wlan0. When trying to search for AP on my laptop, I do get an Hidden network; I tried to connect but with no result. I do see that ra0, used by me for AP, states Not-Associated. I am using only /etc/ne
  10. hello Bubba, Thanks for the update. I do not get what is http://pulpstone.pw/ website all about.
  11. Also, what is the purpose of this header in /etc/network/interfaces: source /etc/network/interfaces.d/* since this file is always empty... ? Thanks.
  12. Hello, I am trying to setup my OPI Lite wi-fi connection with no success. (OPI Lite has only WiFi connection) I downloaded and installed Debian_jessie_default_3.4.113. I have updated /etc/network/interfaces with next: ### General setup - Local loopback auto lo iface lo inet loopback ### General setup - WI-FI WAN Network auto wlan0 iface wlan0 inet static address netmask gateway dns-nameservers wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf I have updated
  13. Sorry for getting confused. I do have an I2C sensor that I am trying to manage to send data to the Orange PI Zero/Lite. I want to read data from an I2C sensor using C script. Thanks.