one of the trackers having device eui ending with 02 is facing issue in parsing through the buffer parser. Range issue don't understand why becoz both the trackers are in line of sight to the sky.
[{"id":"f1c3712a.51632","type":"tab","label":"Flow 2","disabled":false,"info":""},{"id":"c573d354.4e202","type":"buffer-parser","z":"f1c3712a.51632","name":"Bulid Tags","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"byte","name":"lat","offset":6,"length":3,"offsetbit":0,"scale":1,"mask":""},{"type":"byte","name":"lon","offset":9,"length":3,"offsetbit":0,"scale":1,"mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"","resultType":"keyvalue","resultTypeType":"output","multipleResult":false,"setTopic":true,"x":350,"y":160,"wires":[["bafbdd1c.dbce3"]]},{"id":"bafbdd1c.dbce3","type":"function","z":"f1c3712a.51632","name":"","func":"var lat = (msg.payload.lat[0] << 24) + (msg.payload.lat[1] << 16) + (msg.payload.lat[2] << 8) \nvar lon = (msg.payload.lon[0] << 24) + (msg.payload.lon[1] << 16) + (msg.payload.lon[2] << 8) \n\nif (lat > 0x7FFFFFFF) { \n lat -= 0x100000000;\n}\n\nif (lon > 0x7FFFFFFF) {\n lon -= 0x100000000;\n}\n\nlat /= 10000000; \nlon /= 10000000;\n\nmsg.payload.lat = lat ;\nmsg.payload.lon = lon ;\nmsg.payload.name = \"apple\"; //set name\nmsg.payload.icon = \"fa-truck\"; //set icon\nmsg.payload.marker = \"layer\"; //set marker\n\n//return msg.payload; WRONG - always return msg!\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":540,"y":140,"wires":[["40ae8e7f.0cd12","dedad9e1.d48fb8"]]},{"id":"40ae8e7f.0cd12","type":"debug","z":"f1c3712a.51632","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":730,"y":80,"wires":[]},{"id":"56b1735a.72088c","type":"mqtt in","z":"f1c3712a.51632","name":"","topic":"bachloo.rahul@gmail.com/test","qos":"0","datatype":"json","broker":"55bef158.86a7c","x":120,"y":40,"wires":[["3b7b5746.9e7358"]]},{"id":"e9da35ff.a1ad48","type":"base64","z":"f1c3712a.51632","name":"","action":"","property":"payload","x":420,"y":80,"wires":[["c573d354.4e202"]]},{"id":"2290cb3c.d51354","type":"function","z":"f1c3712a.51632","name":"","func":"var t=msg.payload;\nmsg.payload=t.data;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":260,"y":100,"wires":[["e9da35ff.a1ad48"]]},{"id":"dedad9e1.d48fb8","type":"worldmap","z":"f1c3712a.51632","name":"","lat":"28.3917824","lon":"76.9599744","zoom":"10","layer":"OSM","cluster":"","maxage":"","usermenu":"show","layers":"show","panit":"true","panlock":"false","zoomlock":"false","hiderightclick":"false","coords":"none","showgrid":"false","path":"/worldmap","x":740,"y":160,"wires":[]},{"id":"3b7b5746.9e7358","type":"switch","z":"f1c3712a.51632","name":"","property":"payload.devEUI","propertyType":"msg","rules":[{"t":"eq","v":"20635f01d1000004","vt":"str"},{"t":"eq","v":"20635f01d1000002","vt":"str"}],"checkall":"true","repair":false,"outputs":2,"x":110,"y":140,"wires":[["2290cb3c.d51354","6e345130.6a998"],["e996d627.23eab8","c399960d.750c38"]]},{"id":"cbe3233e.1dc17","type":"buffer-parser","z":"f1c3712a.51632","name":"Bulid Tags","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"byte","name":"lat","offset":6,"length":3,"offsetbit":0,"scale":1,"mask":""},{"type":"byte","name":"lon","offset":9,"length":3,"offsetbit":0,"scale":1,"mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"","resultType":"keyvalue","resultTypeType":"output","multipleResult":false,"setTopic":true,"x":291,"y":256,"wires":[["5bcd89ac.eec178"]]},{"id":"5bcd89ac.eec178","type":"function","z":"f1c3712a.51632","name":"","func":"var lat = (msg.payload.lat[0] << 24) + (msg.payload.lat[1] << 16) + (msg.payload.lat[2] << 8) \nvar lon = (msg.payload.lon[0] << 24) + (msg.payload.lon[1] << 16) + (msg.payload.lon[2] << 8) \n\nif (lat > 0x7FFFFFFF) { \n lat -= 0x100000000;\n}\n\nif (lon > 0x7FFFFFFF) {\n lon -= 0x100000000;\n}\n\nlat /= 10000000; \nlon /= 10000000;\n\nmsg.payload.lat = lat ;\nmsg.payload.lon = lon ;\nmsg.payload.name = \"gps\"; //set name\nmsg.payload.icon = \"fa-truck\"; //set icon\nmsg.payload.marker = \"layer\"; //set marker\n\n//return msg.payload; WRONG - always return msg!\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":471,"y":236,"wires":[["a1dde264.4424","7af6dc66.00a194"]]},{"id":"a1dde264.4424","type":"debug","z":"f1c3712a.51632","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":651,"y":216,"wires":[]},{"id":"e996d627.23eab8","type":"function","z":"f1c3712a.51632","name":"","func":"var t=msg.payload;\nmsg.payload=t.data;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":191,"y":196,"wires":[["cbe3233e.1dc17"]]},{"id":"7af6dc66.00a194","type":"worldmap","z":"f1c3712a.51632","name":"","lat":"28.3917824","lon":"76.9599744","zoom":"10","layer":"OSM","cluster":"","maxage":"","usermenu":"show","layers":"show","panit":"true","panlock":"false","zoomlock":"false","hiderightclick":"false","coords":"none","showgrid":"false","path":"/worldmap","x":651,"y":296,"wires":[]},{"id":"c399960d.750c38","type":"debug","z":"f1c3712a.51632","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":110,"y":280,"wires":[]},{"id":"6e345130.6a998","type":"debug","z":"f1c3712a.51632","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":390,"y":40,"wires":[]},{"id":"55bef158.86a7c","type":"mqtt-broker","name":"","broker":"maqiatto.com","port":"1883","clientid":"","usetls":false,"compatmode":false,"keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","closeTopic":"","closeQos":"0","closePayload":"","willTopic":"","willQos":"0","willPayload":""}]
payload1
{"applicationID":"1","applicationName":"cloud","data":"A0hIggANEOxCLd8jBOVh8g==","devEUI":"20635f01d1000004","deviceName":"abeeway tracker2","fCnt":594,"fPort":18,"rxInfo":[{"altitude":0,"latitude":0,"loRaSNR":8.5,"longitude":0,"mac":"24e124fffef0a78e","name":"24e124fffef0a78e","rssi":-47,"time":"2020-11-17T11:58:23.441765Z"}],"time":"2020-11-17T11:58:23.441765Z","txInfo":{"adr":true,"codeRate":"4/5","dataRate":{"bandwidth":125,"modulation":"LORA","spreadFactor":7},"frequency":865402500}}
payload2
{"applicationID":"1","applicationName":"cloud","data":"A0hThwAJEOxGLd8jBsdI2w==","devEUI":"20635f01d1000002","deviceName":"abeeway tracker","fCnt":195,"fPort":18,"rxInfo":[{"altitude":0,"latitude":0,"loRaSNR":8.5,"longitude":0,"mac":"24e124fffef0a78e","name":"24e124fffef0a78e","rssi":-78,"time":"2020-11-17T11:56:39.509754Z"}],"time":"2020-11-17T11:56:39.509754Z","txInfo":{"adr":true,"codeRate":"4/5","dataRate":{"bandwidth":125,"modulation":"LORA","spreadFactor":7},"frequency":865402500}}