Using MQTT worked. Here is a link to the flow and a screenshot of it for anyone interested in using it.
Thanks for the help Glyn and Jon.
Update: here is a copy of the flow
[{"id":"83cf3f33.85205","type":"mqtt-broker","z":"","broker":"10.1.10.200","port":"1883","clientid":"","usetls":false,"verifyservercert":true,"compatmode":true,"keepalive":"60","cleansession":true,"willTopic":"","willQos":"0","willRetain":null,"willPayload":"","birthTopic":"","birthQos":"0","birthRetain":null,"birthPayload":""},{"id":"68c3c93f.51d4b8","type":"mqtt in","z":"5ab7703b.4b958","name":"Bench Temperature","topic":"emon/EmonTH1/temperature","broker":"83cf3f33.85205","x":141,"y":118,"wires":[["fef4f107.56746"]]},{"id":"7d4ed145.fe8ee","type":"debug","z":"5ab7703b.4b958","name":"","active":false,"console":"false","complete":"true","x":919,"y":261,"wires":[]},{"id":"fef4f107.56746","type":"function","z":"5ab7703b.4b958","name":"str to float","func":"var temp = parseFloat(msg.payload)\nnewMsg = msg\nnewMsg.payload = temp\nreturn newMsg;","outputs":1,"noerr":0,"x":166,"y":176,"wires":[["a19bc9bf.b48de8"]]},{"id":"d8f27098.71576","type":"function","z":"5ab7703b.4b958","name":"All Values in one Msg","func":"context.data = context.data || {};\nif(msg.payload < 0){\n var hum = msg.payload + 101;\n context.data.humidity = hum;\n msg = null;\n} else if (msg.payload >= 0) {\n var temp = msg.payload - 100;\n context.data.tempF = temp;\n msg = null;\n} else msg = null;\n\nif(context.data.humidity != null && context.data.tempF != null){\n var hum = context.data.humidity;\n var temp = context.data.tempF;\n context.data = null;\n return {humidity: hum, tempF: temp};\n //return {humidity: context.data.humidity, temp: context.data.tempF};\n} else return msg;","outputs":"1","noerr":0,"x":449,"y":365,"wires":[["f0a17ab5.0a8f58"]]},{"id":"c3cb9f42.f89e1","type":"mqtt in","z":"5ab7703b.4b958","name":"Bench Humidity","topic":"emon/EmonTH1/humidity","broker":"83cf3f33.85205","x":141,"y":429,"wires":[["edb06f6a.47437"]]},{"id":"edb06f6a.47437","type":"function","z":"5ab7703b.4b958","name":"str to float","func":"var temp = parseFloat(msg.payload)\nnewMsg = msg\nnewMsg.payload = temp\nreturn newMsg;","outputs":1,"noerr":0,"x":140,"y":480,"wires":[["6da21578.b689ec"]]},{"id":"6da21578.b689ec","type":"function","z":"5ab7703b.4b958","name":"Make Negative","func":"var hum = msg.payload\nhum -= 101\nmsg.payload = hum\nreturn msg;","outputs":1,"noerr":0,"x":142,"y":545,"wires":[["d8f27098.71576"]]},{"id":"a19bc9bf.b48de8","type":"function","z":"5ab7703b.4b958","name":"C to F","func":"var temp = msg.payload;\ntemp = temp * 1.8 + 32;\nmsg.payload = temp;\n\nreturn msg;","outputs":1,"noerr":0,"x":160,"y":238,"wires":[["3136cdf9.5c67d2"]]},{"id":"3136cdf9.5c67d2","type":"function","z":"5ab7703b.4b958","name":"Make Positive","func":"var temp = msg.payload;\ntemp += 100;\nmsg.payload = temp;\nreturn msg;","outputs":1,"noerr":0,"x":152,"y":304,"wires":[["d8f27098.71576"]]},{"id":"f0a17ab5.0a8f58","type":"function","z":"5ab7703b.4b958","name":"EMC calculation","func":"var tf = msg.tempF\nvar h = msg.humidity\nh /= 100;\nvar t2 = tf * tf;\nvar w = 330 + 0.452 * tf + 0.00415 * t2;\nvar k = 0.791 + 0.000463 * tf - 0.000000844 * t2;\nvar ka = 6.34 + 0.000775 * tf - 0.0000935 * t2;\nvar kb = 1.09 + 0.0284 * tf - 0.0000904 * t2;\nvar m = 1800 / w * ( k * h / (1 - k * h)+ (ka * k * h + 2 * ka * kb * k * k * h * h)/ (1 + ka * k * h + ka * kb * k * k * h * h));\nreturn {\"payload\": m};","outputs":1,"noerr":0,"x":670,"y":366,"wires":[["7d4ed145.fe8ee","5f8222bd.4b86ec"]]},{"id":"5f8222bd.4b86ec","type":"mqtt out","z":"5ab7703b.4b958","name":"","topic":"emon/EmonTH1/EMC2_Bench","qos":"","retain":"","broker":"83cf3f33.85205","x":941,"y":366,"wires":[]}]
And here is a link back to the original project this was needed for:
EMC Monitoring Version 2.0 - Using stock EmonTH firmware
-Berkeley