**** BEGIN LOGGING AT Fri Feb 15 02:59:56 2019 Feb 15 03:36:00 Hi I am trying to connect my beaglebone Rev C board through the USB port it got connected initially once but now its coming as connection error please help Feb 15 03:36:27 I am using UBUNTU 16.0.4 Feb 15 04:53:11 how to get password for root Feb 15 04:53:46 password for root@192.168.8.1 Feb 15 07:39:29 i want to run kivy gui in beaglebone black but i can't install it due to insufficient space..so what is best way to run minimal gui on BBB..? Feb 15 07:45:51 What are the advantages of BeagelBoard over Raspberry PI3 B +? Feb 15 07:48:53 you can run completely open source software on it. Feb 15 07:49:10 other then that the comparison is not really meaningful as those are fairly different Feb 15 08:41:45 Im sorry, can somebody copy the answer about advantages of beagle boards, im closed the tab and lost all messages... Feb 15 09:02:11 Gamma_: http://logs.nslu2-linux.org/livelogs/beagle.txt Feb 15 09:03:20 the hardware design is open and the components can actually be purchased even in low quantity, so you can make custom designs based on it. the SoC is well-documented (5000+ pages TRM you can download without even having to register), you don't need any binary blobs apart from the (completely optional, not installed by default) userspace libs for the GPU Feb 15 09:04:28 it has lots of I/O, including high-precision pwm, edge capture, quadrature decoders / pulse/frequency counters Feb 15 09:05:51 it has two real-time cores with direct I/O connections for generating custom signals with 5ns accuracy and reacting to external stimuli with extremely low latency (on the order of a few dozen nanoseconds) Feb 15 09:08:01 How is ethernet connected on a beaglebone ? Is it on USB like a pi ? Feb 15 09:08:03 it has real ethernet, rather than some usb-to-ethernet chip. it can even boot from ethernet (using a BOOTP/TFTP server) if you put some effort into it Feb 15 09:09:20 Hi guys Feb 15 09:09:39 it has an onboard FS instead of a slightly dodgy sd card Feb 15 09:09:56 (the SoC itself actually has two gigabit ethernet ports connected to an internal managed switch, but you'd need to make a custom design to take advantage of that. the beaglebone normally has only one 100Mbit ethernet connection, although there's a beaglebone variant that has a gigabit ethernet port) Feb 15 09:09:57 I need to bridge two beaglebone black wireless devices Feb 15 09:10:26 yuva: you can't. why don't you simply connect both beaglebones and both laptops to the same wifi network? Feb 15 09:10:36 instead of using the AP mode at all Feb 15 09:11:15 Gamma_: oh yeah, artag made a good point, the beaglebone black has on-board eMMC in addition to the SD card slot Feb 15 09:11:37 (it can boot from either) Feb 15 09:12:34 AP does not support bridging? Feb 15 09:13:13 yuva: you can bridge AP to ethernet, if you had ethernet, but you can't connect a wifi connection in station mode to a bridge Feb 15 09:13:32 this is true in general, not just for the beaglebone black wireless Feb 15 09:13:33 I want use this for IOT mesh network. is there any way avaible Feb 15 09:13:44 mesh is a completely different thing Feb 15 09:14:34 the hardware of the beaglebone black wireless does support mesh, but I don't know any details about how it works Feb 15 09:14:42 I'm pretty sure TI has resources about it Feb 15 09:15:38 May i know what is TI Feb 15 09:16:36 Texas Instruments, the company that makes the wifi/bluetooth chipset used on the BeagleBone Black Wireless (as well as the AM335x SoC) Feb 15 09:16:57 http://www.ti.com/lit/an/swaa166/swaa166.pdf Feb 15 09:19:12 a mesh node can also be bridged to AP and/or Ethernet Feb 15 09:19:29 (bridging it to AP allows non-mesh clients to connect) Feb 15 09:20:05 mesh time zone sync (chapter 6) is not supported btw Feb 15 09:34:47 Gamma_: you're welcome. Feb 15 10:12:40 Zmatt : Thanks for the clarification Feb 15 13:18:20 zmatt: if the SoC has a gigabit line what is stopping from setting the gigabit mode ? Feb 15 13:29:38 mawk: you need appropriate PHY chip to have Gbit ethernet Feb 15 13:39:40 mawk: the beaglebone uses a 100Mbit PHY connected via MII, not a gigabit phy connected via RGMII Feb 15 13:40:14 I see Feb 15 13:40:53 if you're very creative you could desolder the phy and use wires to connect it to a gigabit phy :) Feb 15 13:41:09 (this has been done by at least one person) Feb 15 13:41:37 there's also SanCloud's BeagleBone Enhanced, which has gigabit Feb 15 14:07:00 Happy Friday! Feb 15 14:20:11 \o/ Feb 15 20:48:28 Hello, does anyone happen to know how long the BBB should be powered off before attempting to power on again? For instance, if I power the BBB with a 5V supply and switch the supply off and on again in ~100 ms, would that be sufficient time to adequately shutdown/power off the board? Feb 15 20:50:57 uhh Feb 15 20:51:27 I'm curious to know what the reason/context of this question is :P Feb 15 20:56:33 I guess it would mainly depend on how long it takes after switching off the supply until the voltage drops low enough to trigger a poweroff, which will depend on the output caps of the supply and how much power the beaglebone is drawing. I'm not aware of the pmic requiring some specific off-time before powering on again, but I've never tested it Feb 16 01:06:47 anybody working with bb blue or bb with strawson design robotics cape? Feb 16 01:08:13 oddly, before flashing the board, when I ran one of the rc motor test programs, all motors ran as expected. after flashing, now only one motor runs? not that it's a great concern but I'm left wondering what would have made that happen Feb 16 01:09:09 something got lost Feb 16 01:10:39 the name of the program was rc_test_motors Feb 16 01:20:47 zmatt: That diagram/schematic you gave me to attach a NPN transistor to the BBBlue, https://photos.app.goo.gl/S38CeKmFUe8gBwdn7, has me a bit pondering life. Feb 16 01:20:48 ... Feb 16 01:21:20 Do I connect the 10k resistor to the Rx and 3.3v? Feb 16 01:21:48 And then the 10k resistor then goes to the NPN transistor? Feb 16 01:22:20 three-way connection at that junction? Feb 16 01:24:15 Let me grab another diagram.... Feb 16 01:24:17 Please hold. Feb 16 01:28:03 https://photos.app.goo.gl/AxEj3vvochSNFHr88 has a circled section for reference. I know this should be easy and it is. I just do not want to make this three-way connection of my NPN transistor at the 10k resistor. Feb 16 01:33:17 Anyway...if you have time tonight or tomorrow, I will check back. Feb 16 01:33:17 ... Feb 16 01:33:52 I will just go and make the connection to test things out first. Aw! Feb 16 01:35:07 http://www.farnell.com/datasheets/2287718.pdf?_ga=2.250844806.1057122439.1550280595-409008170.1550280595 is my NPN transistor. Feb 16 01:41:09 set_: I don't understand your question or what's unclear about the schematic... it seems pretty unambiguous to me Feb 16 01:45:02 bbl Feb 16 01:45:37 No! Feb 16 01:45:53 Okay. See you later. Feb 16 01:46:29 So, the emitter goes to GND on the BBBlue and the Receiver? Feb 16 01:48:08 On the BBBlue, the DSM2 port has a GND and this GND ends up at a three-way junction at the Emitter part to the Transistor and the GND of the Sbus at the receiver? Feb 16 01:48:37 Right? Feb 16 01:53:40 Also, are there two "three-way junctions" on this diagram? Feb 16 02:02:42 what's your question about the schematic set_ precisely ? Feb 16 02:03:20 you're making a poor man's level shifter, if I understood correctly ? Feb 16 02:07:31 set_: when the pin labeled signal is brought up, that activates the transistor which connectors RX to ground Feb 16 02:07:55 and when the signal pin is grounded or floating, the RX pin is pulled up by the 10k resistor Feb 16 02:10:11 precisely RX is connected to 0.6V when signal is brought up Feb 16 02:10:17 but it's almost 0 Feb 16 02:13:36 also yes this is a "three-way connection" set_ I don't know what's strange about it Feb 16 02:13:46 it's required Feb 16 02:13:57 unless RX has a 3.3V pull-up otherwise Feb 16 02:15:05 but remember that you can slide the node along the wire wherever you want Feb 16 02:15:17 you can put that pullup resistor anywhere on the RX line Feb 16 02:15:30 you're not obligated to make a "three-way connection" Feb 16 02:17:39 Right. Feb 16 02:18:10 mawk! Feb 16 02:18:12 Hello! Feb 16 02:18:14 yes! Feb 16 02:18:15 hello Feb 16 02:18:16 lol Feb 16 02:18:33 Hey mawk: Okay so, are there two three-way connections on that diagram? Feb 16 02:18:52 there are no essential three way connections Feb 16 02:18:58 None? Feb 16 02:19:00 you can connect anywhere on the wire Feb 16 02:19:14 it's just the way it's currently drawn that make it looks like three-node junctions Feb 16 02:19:19 but you can solder it like you want Feb 16 02:19:31 Okay. It is already soldered and shotty at that. Feb 16 02:19:41 but it's easier for comprehension to draw it like this Feb 16 02:20:00 I understand. Feb 16 02:20:10 So, the GND is common? Feb 16 02:20:39 And, the emitter from the NPN is involved, right? Feb 16 02:21:47 every pin from the NPN is involved Feb 16 02:21:52 emitter, collector, base Feb 16 02:21:55 Right. Feb 16 02:21:59 the ground is common yes Feb 16 02:22:02 I got that part. Okay. Feb 16 02:22:09 you can't do circuits without a common ground without some means of isolation Feb 16 02:22:23 GND is common, got it. Oh. Feb 16 02:22:24 Okay. Feb 16 02:22:27 you can do isolation with optics (opto-isolator, optic fiber), or with transformers Feb 16 02:22:41 you have some other tricks like phonic transmitters or wireless but it's a bit out of scope Feb 16 02:22:57 I am going to test this really horrible soldered concoction of wires. Feb 16 02:22:59 the circuit must close Feb 16 02:23:14 Brb w/ answers and issues (I promise). Feb 16 02:23:15 current is the flow of electron Feb 16 02:23:43 Okay. Got it. Feb 16 02:23:47 if the pipe isn't connected electron can't flow and the current is null Feb 16 02:24:10 I need null current like I need a motor to fly. Feb 16 02:24:17 lol Feb 16 02:24:19 Ha! Feb 16 02:24:28 Please hold. I will go and test this connection. Feb 16 02:41:40 Okay. Feb 16 02:41:59 Nothing happened but I think it is not b/c of the connection. Feb 16 02:42:17 The connection did not cause harm nor did it may motors fly but... Feb 16 02:43:08 at /sys/class/gpio/, instead of gpio80, I have other gpiochip0 32 64 96. Feb 16 02:43:14 w/ export and unexport. Feb 16 02:43:36 gpio and gpiochip are different things Feb 16 02:43:51 I was supposed to have this cmd work: echo 1 > /sys/class/gpio/gpio80/value Feb 16 02:43:58 Oh...Okay. Feb 16 02:44:08 you should have a ton of gpios there though Feb 16 02:44:18 unless your device tree configuration is weird Feb 16 02:44:34 can you pastebin your /boot/uEnv.txt ? Feb 16 02:44:40 Okay. So, I just use echo 1 > ../../../gpiochip?/gpio80/value? Feb 16 02:44:52 Sure. Let figure that out. Feb 16 02:45:06 I need to bring in the BBBlue on this computer. Feb 16 02:45:08 Please hold. Feb 16 02:46:42 actually no, uEnv.txt shouldn't matter, the blue has cape-universal integrated Feb 16 02:46:46 but share it anyway Feb 16 02:47:50 ohh, it lacks the gpio helper? so maybe you need to export gpios you need Feb 16 02:48:19 I will check. Feb 16 02:48:53 I will share it the uEnv.txt file and look up export rules. Feb 16 02:49:47 to export gpio80, do: echo 80 >/sys/class/gpio/export Feb 16 02:49:53 then /sys/class/gpio/gpio80 should appear Feb 16 02:50:53 https://pastebin.com/dDQS5tu4 Feb 16 02:50:54 Okay. Feb 16 02:50:56 Please hold. Feb 16 02:51:57 Yep. gpio80 popped up. Feb 16 02:52:55 Sould I try the old command: echo 1 > /sys/class/gpio/gpio80/value? Feb 16 02:53:16 that will enable the 6V output on the servo headers Feb 16 02:53:34 Okay b/c the value file has 0 as of now. Feb 16 02:53:36 Okay. Feb 16 02:54:03 actually, wait its direction will be input right now Feb 16 02:54:23 instead, do: echo high >/sys/class/gpio80/direction Feb 16 02:54:29 Okay. Feb 16 02:54:33 Let me check direction too. Feb 16 02:54:51 doing so will change the direction to output and the value to 1 Feb 16 02:55:34 Okay. Let me check that really quickly. Feb 16 02:56:21 Yep. out for direction & 1 for value. Feb 16 02:56:47 I thought the BBB.io persons got rid of this function? Feb 16 02:56:55 Changing things manually. Feb 16 02:56:59 ??? Feb 16 02:57:13 I am wrong as usual. Feb 16 02:57:30 it's a bit odd that you have to export the gpios Feb 16 02:57:38 normally those are exported automatically Feb 16 02:57:43 Oh. Feb 16 02:57:50 Now I know. Feb 16 02:58:20 zmatt: I would show you a photo of that job I did on the diagram you showed me. Feb 16 02:58:23 But... Feb 16 02:58:33 It is horribly difficult to look at. Feb 16 02:58:42 So, I will save you the trauma. Feb 16 02:59:04 Okay. Off to check the output of this idea. Thank you both. Feb 16 02:59:18 Oh wait. Feb 16 02:59:37 Does this maintain the value and direction after a reboot/boot? **** ENDING LOGGING AT Sat Feb 16 02:59:57 2019