Hi Sara,
Sorry for replying late but I was busy setting up a 25 node Sensor network after the Easter break. The code seems to be alright, it seems to be more the Serial side problem. Search the list about baudrates and keywords such as "bad packet", "packet too long" and I am sure you will be able to find the solution. From my experience, try to adjust the baudrate to 57600bps. You need to make changes at two places. /platform/hardware.h and /support/sdk/java/net/tinyos/packet/Baudrate.java and then recompile the tinyos.jar by doing a make in this location /support/sdk/java/ Hope it helps, Varun From: sara so [mailto:[email protected]] Sent: Friday, 10 April 2009 6:34 PM To: Varun Jain Subject: Re: generate data tinyos Hi Varun, I have posted this to the mailing list, but could you please help. I have a little problem in the attached code, what I am trying to do is just read the light sensor periodically and send it with some other data to the Basestation but whenever I run Listen application then it display "bad packet", "packet too long", resynchronising!!! Could you please take a quick look to my small code, maybe I miss something. Thanks for any help and happy Easter Sara include <Timer.h> #include "BlinkToRadio.h" module BlinkToRadioC { uses interface Boot; uses interface Leds; uses interface Timer<TMilli> as Timer0; uses interface Packet; uses interface AMPacket; uses interface AMSend; uses interface Read<uint16_t> as ReadLight; uses interface SplitControl as AMControl; } implementation { uint16_t counter; message_t pkt; bool busy = FALSE; uint16_t light; event void Boot.booted() { call AMControl.start(); } event void AMControl.startDone(error_t err) { if (err == SUCCESS) { call Timer0.startPeriodic(TIMER_ PERIOD_MILLI); } else { call AMControl.start(); } } event void AMControl.stopDone(error_t err) { } \\ may be here is the problem event void Timer0.fired() { call ReadLight.read(); if (!busy) { BlinkToRadioMsg* btrpkt = (BlinkToRadioMsg*)(call Packet.getPayload(&pkt, sizeof(BlinkToRadioMsg) )); btrpkt->nodeid = TOS_NODE_ID; btrpkt->counter = counter++; btrpkt->photo =light; if (call AMSend.send(0, &pkt, sizeof(BlinkToRadioMsg)) == SUCCESS) { busy = TRUE; } } } event void AMSend.sendDone(message_t* msg, error_t err) { if (&pkt == msg) { busy = FALSE; } } event void ReadLight.readDone(error_t result, uint16_t data) { if (result == SUCCESS){ light = data; } }} for wireing : implementation { components MainC; components BlinkToRadioC as App; components new TimerMilliC() as Timer0; components ActiveMessageC; components new AMSenderC(AM_BLINKTORADIO); components new HamamatsuS10871TsrC() as SensorLght; On Wed, Apr 8, 2009 at 3:39 AM, sara so <[email protected]> wrote: Hi Varun, Just to say thank you very much for your help. I will go through that and see. Happy Easter Sara On Wed, Apr 8, 2009 at 2:38 AM, Varun Jain <[email protected]> wrote: Hi Sara, There is a test application given in tinyos-2.x: /apps/tests/TestNetwork This application does both the network protocols possible with TINYOS-2.x i.e. Collection (send data from all the nodes to a SINK node) and also Dissemination (Sending small data items to all the nodes from the Root Node) and I would say that you should play with this application There is another interesting application /apps/Antitheft which does similar to above but it provides you a GUI interface as well to disseminate the items in the network. If you are a beginner, then you can probably take the concept from these applications and change it a little bit to get periodic data for your testing purposes. Say you just have three timers firing at different interval, sending the data to the SINK every time a timer fires and the skeleton code will look something like this: { uses interface Timer<TMilli> as Timer1; uses interface Timer<TMilli> as Timer2; uses interface Timer<TMilli> as Timer3; } { Call Timer1. startPeriodic (256); Call Timer2. startPeriodic (512); Call Timer3. startPeriodic (1024); Uint16_t counter1 = 0; Event void Timer1.fired () { counter1++; atomic { if (!sendBusy) post sendMessage(); } } void sendMessage() { TestNetworkMsg* msg = (TestNetworkMsg*)call Send.getPayload(&packet, sizeof(TestNetworkMsg)); uint16_t metric; am_addr_t parent; call CtpInfo.getParent(&parent); call CtpInfo.getEtx(&metric); msg->source = TOS_NODE_ID; msg->seqno = seqno; msg->data = counter1; msg->parent = parent; msg->hopcount = 0; msg->metric = metric; if (call Send.send(&packet, sizeof(TestNetworkMsg)) != SUCCESS) { call Leds.led0On(); dbg("TestNetworkC", "%s: Transmission failed.\n", __FUNCTION__); } else { sendBusy = TRUE; seqno++; dbg("TestNetworkC", "%s: Transmission succeeded.\n", __FUNCTION__); } } Similarly you can send data when other timers fire. Hope this helps. Let me know if you need any more help. Regards, Varun P.S: I am more than happy to help as much as I can so send me as many queries as you want but also CC your queries to "tinyos-help mailing list" as there are so many other people in the community who can give answers from different perspective. This also helps to people who are looking for your kind of problem/query. From: sara so [mailto:[email protected]] Sent: Tuesday, 7 April 2009 6:41 PM To: Varun Jain Subject: generate data tinyos Hi Varun, I am Sara from Berlin. I found your email while I was searching in Google and hope that you can help me with the following question! I want to be able to to generate data periodically from tmote sky node and send it to the sink. Do you know how can I generate any kind of data and send it. Is there any application that do that. thank you for any help Sara
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