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Hello,
We have installed 2 fuel sensors on vehicles with 2 tanks and unfortunately both sensors are sending fuel data to Wialon in separate messages, because of this we are unable to sum and average fuel data of the two tanks. We are trying to create a single message for both fuel tanks device level but this wlll take some time, Any advise on a workaround is appreciated.
nasnew, I guess if you create the third sensor and in this sensor sum up 2 sensors value it will work. Try it.
I tried this actually, but this will only work incase if data from the two sensors comes in a single message (row) from the device, it shows N/A if other wise
Try to use hash sign before parameter name to get value from the previous message:
fls_param_ex1+#fls_param_ex2
Thank you so much, this is very helpful. by the way can the same be applied to sensors, rather than parameters
by the way can the same be applied to sensors, rather than parameters
No, it can't be applied to sensors now.
Hello,
We have installed 2 fuel sensors on vehicles with 2 tanks and unfortunately both sensors are sending fuel data to Wialon in separate messages, because of this we are unable to sum and average fuel data of the two tanks. We are trying to create a single message for both fuel tanks device level but this will take some time, Any advise on a workaround is appreciated.
There is a special channel in flespi called pipe-cache-params. It is designed as a part of message workflow to accumulate and cache specified parameters and inject them into message passing through the channel. As a result you may end up with the messages in Wialon containing parameters with the values of both fuel level sensors and you do not need any extra complex sensors math.
The messages flow is like this device => flespi original channel => flespi params pipe channel => stream to Wialon => flespi gateway or flespi device in Wialon. Here is more information on streaming from flespi to Wialon if you will implement this solution.
by the way can the same be applied to sensors, rather than parameters
Not sure if it still actual for you, but I can give you a workaround for sensors:
* create "Sensor 1" based on formula -- fls_param_ex1
* create "Sensor 2" based on formula -- #fls_param_ex2
* create "Result sensor" based on formula -- [Sensor 1]+[Sensor 2]
Hello, I tried to create sensors as per your suggestion and created a total sensor which is a sum of two sensors. but the sum of the values of the two sensors is not equal to the value indicated under the total fuel sensor created.
is there any condition by which your suggestion may not work as expected
Hello, I tried to create sensors as per your suggestion and created a total sensor which is a sum of two sensors. but the sum of the values of the two sensors is not equal to the value indicated under the total fuel sensor created.
is there any condition by which your suggestion may not work as expected
Let's switch from theory to practice.
Please, send to support@gurtam.com short description of this case (with link to this forum topic) and the name of the unit.
