Mit send and read data at the same time

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Mit apps keep read null value from thingspeak

Hey can anyone help me…im currently doing smart irrigation project…before im trying to read data from thingspeak…and it workk…after that i try to write data to field5 only…and my apps got a problem…it send notice about bad argument…so i try to look at my code…and bad argument settle…but it suddenly read null value only…after that i make a new apps for read data only…im use the same code and url before this happen…and it not work anymore…it keep read null value…anyone can help me? I think that th…