https://docs.pycom.io/.gitbook/assets/l01-pinout.pdf says: 3V3 pin: Supply with a stable 3V3 power source capable of delivering at least 650mA

@philwilkinson said in Hand soldering OEM modules: Has anyone managed to successfully hand solder the OEM modules onto the reference boards? Lots of solder. Higher great settings. Patience. Nothing seems to work! Yes I've done this many times. My secret is lots of flux, drag soldering and cleaning up with solder wick and more flux. Most problems come from using too much solder creating shorts underneath the pads or too little solder and not making a solid connection.

In my opinion RESET pin should not be left floating. Try to connect pull-up resistor to 3.3V in 10k-20k range. Check L01 OEM Baseboard schematic: https://docs.pycom.io/product-info-datasheets/oem/l01_reference Edit: Sorry, now I noticed the reset pull-up already being in your schematic. Anyway try to use FTP client for script uploading.

@robert-hh ah yes, exactly, in the 16 second time of startup i read some file: planning.txt for see if startup is needed for the device, wifi_name.txt for the device SSID etc... Not all for the code loading!

@thibault The antenna selection does not matter at all, because the W01 has just one antenna port which will used in any case.

@johand As long as you have pysical access to the module, you can extract the image. Then you would have to de-compile the code, which is some effort. If you think that this is a sufficient barrier, then you can go that way. And, as @livius said, this topic has been diesucssed in this forum as well as in forum.microtpython.org. So you are not alone, and I expect some methods to come up.

@misterlisty Thanks for the info. I read your post.

@daniel I did try to erase the flash using esptool and then flashed 1.9.2.b2 with updater.py. Unfortunatelly L01 soldered on OEM baseboard is unstable in case WiFi client connects to it. ets Jun 8 2016 00:22:57 rst:0x1 (POWERON_RESET),boot:0x12 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff9010,len:12 ho 0 tail 12 room 4 load:0x3fff9020,len:388 load:0x40078000,len:11584 load:0x4009fb00,len:848 entry 0x4009fc9c MicroPython v1.8.6-796-g489fafa0 on 2017-10-15; LoPy with ESP32 Type "help()" for more information. >>> os.uname() (sysname='LoPy', nodename='LoPy', release='1.9.2.b2', version='v1.8.6-796-g489fafa0 on 2017-10-15', machine='LoPy with ESP32', lorawan='1.0.0') >>> import time >>> while True: ... print(time.time()) ... time.sleep(1) ... ... ... 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 Guru Meditation Error of type IllegalInstruction occurred on core 0. Exception was unhandled. Register dump: PC : 0x40151ff4 PS : 0x00060630 A0 : 0x80152198 A1 : 0x3ffb6e10 A2 : 0x3ffb6e60 A3 : 0x00000002 A4 : 0x0000000a A5 : 0x0000000a A6 : 0x00000000 A7 : 0x0000000a A8 : 0x00000000 A9 : 0x00000008 A10 : 0x3ffb6340 A11 : 0x00000000 A12 : 0x00000000 A13 : 0x3ffb6eb4 A14 : 0x0000000a A15 : 0x00000000 SAR : 0x00000019 EXCCAUSE: 0x00000000 EXCVADDR: 0x00000000 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0xffffffff Backtrace: 0x40151ff4:0x3ffb6e10 0x40152195:0x3ffb6e40 0x401523e7:0x3ffb6e60 0x40152b2c:0x3ffb6e90 0x40143335:0x3ffb6eb0 Guru Meditation Error of type LoadProhibited occurred on core 0. Exception was unhandled. Register dump: PC : 0x40089d09 PS : 0x00060033 A0 : 0x80088b46 A1 : 0x3ffb6a50 A2 : 0x3ffb6aa0 A3 : 0x3ffb6a70 A4 : 0x00000000 A5 : 0x3ffc482c A6 : 0x00000000 A7 : 0x3ffc4848 A8 : 0x00000012 A9 : 0x3ffb6a20 A10 : 0x3ffb6ae8 A11 : 0x3ffb6a70 A12 : 0x3ffc4bb8 A13 : 0x3ffb6e40 A14 : 0x3ffdbca8 A15 : 0x3ffb6e60 SAR : 0x00000014 EXCCAUSE: 0x0000001c EXCVADDR: 0x00000000 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0x00000000 Backtrace: 0x40089d09:0x3ffb6a50 0x40088b43:0x3ffb6a70 0x4008ae65:0x3ffb6aa0 0x4008b1da:0x3ffb6c70 0x4008aae5:0x3ffb6cb0 0x4008ac60:0x3ffb6d30 0x40081672:0x3ffb6d50 0x40151ff1:0x3ffb6e10 0x40151ff1:0x3ffb6e40 0x401523e7:0x3ffb6e60 0x40152b2c:0x3ffb6e90 0x40143335:0x3ffb6eb0 Guru Meditation Error of type LoadProhibited occurred on core 0. Exception was unhandled. Register dump: PC : 0x40089d09 PS : 0x00060033 A0 : 0x80088b46 A1 : 0x3ffb6690 A2 : 0x3ffb66e0 A3 : 0x3ffb66b0 A4 : 0x00000000 A5 : 0x3ffc482c A6 : 0x00000000 A7 : 0x3ffc4848 A8 : 0x00000012 A9 : 0x3ffb6660 A10 : 0x3ffb6728 A11 : 0x3ffb66b0 A12 : 0x3ffc4bb8 A13 : 0x3ffb6a70 A14 : 0x3ffb6aa0 A15 : 0x00000020 SAR : 0x00000019 EXCCAUSE: 0x0000001c EXCVADDR: 0x00000000 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0x00000000 Backtrace: 0x40089d09:0x3ffb6690 0x40088b43:0x3ffb66b0 0x4008ae65:0x3ffb66e0 0x4008b1da:0x3ffb68b0 0x4008aae5:0x3ffb68f0 0x4008ac60:0x3ffb6970 0x40081672:0x3ffb6990 0x40089d06:0x3ffb6a50 0x40089d06:0x3ffb6a70 0x4008ae65:0x3ffb6aa0 0x4008b1da:0x3ffb6c70 0x4008aae5:0x3ffb6cb0 0x4008ac60:0x3ffb6d30 0x40081672:0x3ffb6d50 0x40151ff1:0x3ffb6e10 0x40151ff1:0x3ffb6e40 0x401523e7:0x3ffb6e60 0x40152b2c:0x3ffb6e90 0x40143335:0x3ffb6eb0

@jmarcelino Thanks a lot., yes those would be very helpful.

@danielm Not that I know of. Personally - but I'm no RF expert - I'd just stick the known values into an online calculator such as https://www.eeweb.com/toolbox/pi-match

@RobTuDelft It's proprietary. I am writing raw HTTP data to TCP socket and then reading and decoding POST data (JSON).

@miroslav-petrov said in Voltage regulator for primary battery: LTC3335 But it is quite expensive or maybe i am looking wrongly...

@jmarcelino Thanks for the clarity on this - I'll make sure @daniel is aware of this. We'll work to make this easier for those using the reference boards. If you've got any additional points that you'd like to suggest, please let me know! I'm going to roll this up into an email, so would be good to collect these points!

Hi @scott, Many thanks for that work ! Thinking this morning that I will do it too this week-end, but you do it so I can do an other thing. The Sipy seem to be the same as the Lopy so it can be easy to duplicate them. BR

@blsmith Using the OEM module + baseboard reference design is practically the same as buying the WiPy, LoPy, etc kits. If you don't want to design a custom board buying the development kit is probably the best option.

@Eric24 we will update the data sheets with more detailed info about operating ranges soon, but in the meantime, from 2.7 to 3.6 V is the recommended range. Same during deep sleep.