Error -304 in writeFields()
显示 更早的评论
Hi,
I am sending environmental data (float) once every 30 minutes from a NodeMCU, so the speed rate is low. Since a couple of months I am experiencing 3-5 errors a day, returning code -304 (Timeout waiting for server to respond) or -301.
I am sending data with this code (very straight-forward):
ThingSpeak.setField( 1, t );
ThingSpeak.setField( 2, h );
ThingSpeak.setField( 3, p );
ThingSpeak.setField( 4, vdd );
int writeSuccess = ThingSpeak.writeFields( myChannelNumber, myWriteAPIKey );
Then I realized that the device was connected to the WIFi extender. If I connect it to the main router (Fritz 7490) WiFi, it does not incur in those errors.
The extender is a NetGear EX7500, with no choice of special settings other than standard WiFi configuration.
What could be the problem?
采纳的回答
Vinod
2020-2-7
0 个投票
I believe you have isolated the problem to your Netgear extender. The symptoms point to a delay of some sort that the extender introduces that causes the write request to time out.
Your best bet is to reach out to netgear to understand the source of the problem. Maybe your extender needs a periodic "keep alive" packet going to ensure that it stays connected to your router?
3 个评论
Fabio Marzocca
2020-2-7
Christopher Stapels
2020-2-7
Is it possible that the extender is placed too far from the hub so that the extender has a poor network conncetion itself? Then it would fail to extend or repeat the network if it could not stay connected itself.
Fabio Marzocca
2020-2-7
更多回答（0 个）
社区
更多回答在 ThingSpeak Community
类别
在 帮助中心 和 File Exchange 中查找有关 ThingSpeak 的更多信息
产品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
