# BlueSmirf Not Sending Data ? **URL:** \ **Category:** Wireless & IoT\ **Created:** [April 9, 2006, 3:29pm UTC](https://community.sparkfun.com/t/bluesmirf-not-sending-data/1703 "2006-04-09T15:29:57Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![mrmerell](https://avatars.discourse-cdn.com/v4/letter/m/c68b51/32.png) [@mrmerell](https://community.sparkfun.com/u/mrmerell)\ **Post date:** [April 9, 2006, 3:29pm UTC](https://community.sparkfun.com/t/bluesmirf-not-sending-data/1703/1 "2006-04-09T15:29:57Z")
Hi all , Recently , i made a project using PIC16F877 connected to MAX232 to Serial port and the output to GUI (Using visual Basic) is OK! Simply call it “an oscilloscope using PIC through serial” Now , i change the method , i took off the serial cable , apply it with bluesmirf . (i only use the TX pin only, RX not use) Here’s the problem . 1. My connection between Bluetooth Module (Third Party) and the blueSmirf is OK! But , no sign it sending the data . If i compare to Serial link , it smoothly send the data. I checked in hyperterminal . 2. Is the bluesmirf suppose to be connected to MAX232 ? If connected to TX pin of PIC , it produce TTL 5V , while MAX232 produce 3 to 7 volt i think … Help me please … (its my Final Year Project) … and my supervisor is like TTL condition … 0 = fail , 5 = OK … no output … considered fail … and … do bluetooth got transmission problem? i dont have any measurement tool and i dont have any idea how to debug bluetooth … I appreciate any comments , since my first posting looks so depressing , i dont have any choice … anyway … thank you … ---
**Author:** ![roach](https://avatars.discourse-cdn.com/v4/letter/r/ee7513/32.png) [@roach](https://community.sparkfun.com/u/roach)\ **Post date:** [April 9, 2006, 5:02pm UTC](https://community.sparkfun.com/t/bluesmirf-not-sending-data/1703/2 "2006-04-09T17:02:05Z")
The RX pin from the BlueSMiRF should be connected to the TX pin on your PIC directly (no MAX232).