Hello @Yunying. Your observation is correct and matches the statements of espressif and others. The ADC should be used with 0 or 6dB attenuation, the 0-reading is at 70 mV, and at high reading it gets very non-linear. You can cope with that in your firmware, and espressif announced a compensation in a later firmware. Even then, it is by no means a high precision ADC. When using the ADC, it is recommended to feed it, like any ADC, with a low impedance, low noise Op-Amp and an input stage which filters ESD and possible destructive signals. That reduces noise too. If you need an isolated input, you have to work with opto-couplers or/and isolation amplifiers. You can also run the whole unit on battery. If you need USB connectivity, there are so called USB-Isolators, which isolate the USB device from the PC. Just look for that e.g. on EBay or Aliexpress. If you need a good quality ADC, use an external one, like the ads1115. There are isolating I2C bridges and DC/DC converters which would allow to run the ADC and input stage in a separate power domain, solving the request for isolation.

@livius said in I connected a passive GPS on a LoPy device on the GPS pin. What is the pin number to read those values?: @rskoniec Thank you :) P.S. price? About 30$

Hi @omer, To answer your first point - Yes, this should be reliable as the number of devices you are wishing to deploy per nano-gateway are relatively small. The requirements you have listed can be matched. For the second point - Yes, line of sight is important for improving the range of LoRa. Without line of sign, range is entirely dependent on the propagation of the signal through the surrounding buildings. For example, the range will be significantly decreased if transmitting through concrete vs plywood. Point three - We have a number of industrial use cases for the LoPy and I'm sure our forum members can back this up! However, some of the owners of these use cases do not wish to be disclose them so you may need to reach out to others on the forum and ask them yourself! Hopefully, I've answered your questions, let me know if you have any more! Thanks, Alex

If you own a home network best wireless router, you'll sometimes need to connect to it for troubleshooting or configuration updates. How to access your router as an administrator requires knowing the router's IP address as well as the administrator login name and password. With wireless routers, you should also be aware of a few common Wi-Fi connection problems and how to solve them.

@maku Thanks a lot !

@rdixey Ok, it seems interesting. Will try! Thanks

@constantinos Fank you very much, i fink it will be very helpfull in my future researchers!

@dClaus said in LoPy Firmware updates fail on Win10: "use the RESET buttom" is not necessary for the WiPy2 Thanx! Good to know. Topic updated!

@pform said in LoRa Nano-Gateway vs LoRaWAN: @bmarkus OK. So if I just wanted to implement a closed LoRa solution whereby a group of nodes transmitted their information periodically back to a Lopy acting as a gateway to my server then I could simply do this using the tutorial I linked? I would not need to consider a LoRaWAN as such? As long as you are happy with a closed system and don't care compatibility, you can do whatever you want and works. But still you must consider the local legal environment as you are using shared unlicensed frequencies. In Europe you are limited to max. 1% transmit duty rate, or 0.1% depending on channel. Rules are different region by region, but there are rules.

Here is our config file on the EU868 Conduit. Apologies for the readability, it's generated by the web UI. Key and app EUI have been replaced with ## characters. /var/config/lora/lora-network-server.conf: {"udp": {"appPortUp": 1784, "appPortDown": 1786, "downstreamPort": 1782, "upstreamPort": 1780}, "log": {"syslog": true, "path": "/var/log/", "console": true, "level": 100}, "whitelist": {"enabled": true, "devices": []}, "addressRange": {"start": "00:00:00:01", "end": "FF:FF:FF:FE"}, "db": "/var/run/lora/lora-net-server.db", "mqtt": {"host": "127.0.0.1", "enabled": true, "port": 1883}, "__v": 2, "test": {"disableRxWindow2": false, "disableDutyCycle": false, "disableRxWindow1": false, "disableRxJoin1": false, "disableRxJoin2": false}, "lora": {"rx1DatarateOffset": 0, "maxTxPower": 26, "channelPlan": "EU868", "minDatarate": 0, "frequencyBand": 868, "netID": "000000", "enabled": true, "rx2Datarate": 7, "dutyCyclePeriod": 60, "antennaGain": 3, "ADRStep": 30, "packetForwarderConfig": "", "frequencySubBand": 1, "nodeQueueSize": 16, "maxDatarate": 7, "packetForwarderMode": false, "frequencyEU": 869500000}, "network": {"key": "################################", "leasetime": 0, "name": "", "passphrase": "", "eui": "##:##:##:##:##:##:##:##", "public": true}} Now we'll try a 915MHz Conduit with LoPy...

@jmarcelino Thanks for the clear explanation. I asked again because i read somewhere that it was possible, but i can't find that page anymore. But maybe that was the original pyboard too. Well, then I will continue without :)

Pin interrupts are done via pin.callback(trigger, handler=None, arg=None) Check the Pin manual for details https://docs.pycom.io/pycom_esp32/library/machine.Pin.html

Hi did someone managed to make it work with an external GPS module I have the data coming in but when i tried to use the lib micrpyGPS it failed since it wasn't able to allocat memory so before starting re writing everything to convert the sentance if someone had any sketchup >>> from micropyGPS import MicropyGPS Traceback (most recent call last): File "<stdin>", line 1, in <module> MemoryError: memory allocation failed, allocating 136 bytes >>> com = UART(1,pins=("P3","P4")) >>> com.readline() b'$GPVTG,,,,,,,,,N*30\r\n' >>> com.readline() b'$GPG$GPRMC,12$GPVTG,,,,,,,,,N*30\r\n' >>> com.readline() b'$GPGGA,123243.00,,,,,0,0$GPRMC,123244.00,V,,,,,,,210217,,,N*78\r\n'

I succeeded in sending data from SX1272 to LoPy , but failed in sending data from LoPy to SX1272. While sending data from LoPy to SX1272 i m getting some garbage values along with my actual payload with i sent from LoPy. Anyone got this worked ?

@bucknall Thanks, Alex!

@JBijnens One way to test would be with another LoPy in RAW LoRa mode. What kind of antenna are you using now?

@mkharibalaji Maybe no one - because rather none of us use Pymakr try the same with ftp e.g. Filezilla You then can have more control about