Hi, We want to send picture with LoRaWAN, to cloud of TTN To send picture we will convert it to string file and then send packets Our question : with TTN, is there a message limitation per day ? is it possible to send picture ( series of frame ), with LoRaWAN ? Thank you

It is possible, but it will be a small picture since LoRa is made for and limited for low bandwith. How ‘much’ data you can send, depends on a few factors which are well explained by @arjanvanb in this post: [image] Fair Use Policy explained End Devices (Nodes) For The Thi…

Why not say the limitations of LoRaWAN? Small bandwidth, extremely small bandwidth, and no pictures or such, just sensor data. And also actuator data, as switching things on and off. LoRaWAN is not Internet as such, it is small bandwidth in the extremes! But it is useful and needed for application…

Also, if you have a large file that you split into many pieces, you would want some confirmation that each part has been received. That would need the gateway to confirm each uplink. But the gateway has the same limitations as nodes, but a gateway needs to share that limitations among many, many nod…

[image] arjanvanb: So: no, not possible. Hello and thank you for your response But what if we have only one node ( it’s just a demo ) For splite the file, yes it’s possible, but we ask if TTN can accept the large number of packets send ? thanks

Hi @anisbh , In the fastest (LoRa) modulation scheme you can send approx. 11000 bps in packets of 250 bytes. The time on air is then 194.69 ms per packet. With the 30 seconds fair access policy of TTN this gives you the possibility to send 38522 bytes per day, which is equivalent to one 700x300 pixe…

[image] scle: The time on air is then 194.69 ms per packet. …but only in the best situation. On SF7, one can send about 222 bytes each time, which then takes 368.90 ms and allows for only 81 such packets per day. So then it’s a 17,982 bytes image, assuming all packets are received well. For…

Hi @arjanvanb even, we tried to send a very small image ( 3 kbytes), 3 packets from 6 , was lost so, there is no solution to send image, even it’s a very small image ? thanks

3 kbytes is not small for LoRaWAN. See the link Knology provided, and also see LoRaWAN Limitations on the Wiki: The LoRaWAN no list: … Sending photos, … And: … Payload should be as small as possible. A good goal is to keep it under 12 bytes. … Interval between messages should be in the ran…

not very usefull… and your topic kicking, we don’t like that [image] Fair Use Policy explained End Devices (Nodes) For The Things Network’s public community network the Fair Access Policy limits the data each end-device can send, by allowing: An average of 30 seconds up…

Send picture via LoRaWAN?

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BoRRoZ July 31, 2018, 10:17pm 11

not very usefull… and your topic kicking, we don’t like that