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    Strange HC-12 configuration

    Hi Hippy and PhilHornby, You (Hippy) know the pgm (it is yours and it has served me very well until now): PowerOnReset: SetFreq M16 High TXpin low HC12_SET pause 12000 ***** Countt = 1 SerTxd(...
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    Strange HC-12 configuration

    Hi, I am having a strage experience with HC-12 configuration. If I set the configuration normally I get: Started PowerOnReset R:f[86][98][86][98][E6][98][18] (AT) R:f[86][98][86][98][E6][98][18] (AT+B4800) R:f[86][98][86][98][E6][98][18] (AT+V090) R:f[86][98][86][98][E6][98][18] (AT+F03)...
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    Cannot control ringing sound and loudspeaker in SIM900

    Hi, I have a SIM900 controlled by a PICAXE 28X2 and a loudspeaker (8 OHM) connected to the EPP female of the SIM900. When I call the SIM900 I get a very shrill ringing sound. When the 28X2 picks up the phone the ringing stops and I can very faintly hear the caller's voice in the loudspeaker...
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    Sim900 A6

    Hi PieM og AllyCat, I have dropped the A6 for now. I am using SIM900. It can also be destroyed (I dont know how), but it seems more robust. Thank you for your help. Best regards torben
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    Sim900 A6

    Hi PieM and AllyCat, I have now connected: - Mini usb supply power to the A6 (5 V, 2 A) - VCC_IN and GND of the A6 are connected via 100 nF and 4700 uF in parallel - pin 18 of 28X2 and U_TXD are connected - pin 17 of 28X2 and U_RXD are connected - the 28X2 is powered by a wall-wart The blue...
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    Sim900 A6

    Hi PieM and AllyCat, I am a bit confused. The capacitor goes on the A6. The capacitor should be smaller that 4700 uF - how much smaller? Or connect the 4700 uF in parallel with the 100 nF. I will try that right away. torben
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    Sim900 A6

    Hi PieM, I have put the 4700 uF on one A6 and it made no difference: They all (I have 3) act the same way: When I power them up the blue light flickers on irregularly and is heard from no more. And no green light. The one with 4700 uF on certainly is not on the net because when I call it, I am...
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    Sim900 A6

    Hi PieM, I will get a 4700 uF capacitor tomorrow. I assume "on the rail" refers to 28X2. It will then replace a 100nF capacitor I have there now. torben
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    Sim900 A6

    Hi PieM, I mean, would a resistor not do the job, peut-être? torben
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    Sim900 A6

    Hi PieM, My electronics knowledge is limited, but I assume that "on the rail" means placing the 4700uF capacitor between the TX pin on the computer and and the U_RXD pin on the A6. Does that ensure that the U_RXD pin is supplied with 3.3 v if the computer is supplied with approx. 5 v from the...
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    Sim900 A6

    Hi, I may add that I have never seen a green light on the A6 and the blue light only flickers on every now and then in spite of AT+CSQ readings of about 15,99. The A6 did, however, send and receive SMS OK. torben
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    Sim900 A6

    Hi, I have 2 Sim900 A6 connected to Picaxe 28X2 (with an AXE 033 LCD attached) and I power the 28X2 from the A6: VCC_IN on A6 to Picaxe Pin 20 (+V) GND on A6 to Picaxe Pin 19 (-V) U_TXD on A6 to Picaxe Pin 18 (hserin) U_RXD on A6 to Picaxe Pin 17 (hserout) The A6 is powered by a micro USB...
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    AT command

    Hi After fiddling with AT commands it works - sort of. torben
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    AT command

    Hi, The mic is an elektret (?) mic. torben
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    AT command

    Hi, When I place my hand close to SIM900 the noise gets lower and at certain positions of my hand the noise disappears. It does not matter if I hold the phone or leave the phone and go to another room or bring the phone with me to an adjacent room. It is only a question of me nearly touching the...
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    AT command

    Hi, When I call the SIM900 and the phone is picked up (the PICAXE issues ATA) I hear in the calling phone a rather loud (horrible) tone. It is very weakly heard in the SIM900's loudspeaker too. I may have set it off myself by AT command, but in that case I cant remember the command. Can anybody...
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    AT command

    Hi, Thanks - it works. torben
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    AT command

    Hi Julian and PieM, Marvelous!!!!! Now my SIM900 is working, But Is'nt $22 the same as 34? Thank you torben
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    AT command

    Hi I should issue the command: at+clck="SC",0,"1111" and tried to do it with: hSerOut 0, ( "AT+CLCK=",$22,"SC",$22,",",#b10,",",$22,"0411",$22,cr) and i get ERROR What is wrong? By the way, I have a sim900 which will not connect to network (I think it should so automatically). All AT commands...
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    Configuring HC12

    Hi AllyCat and PhilHornby, I got one HC12 working (apparently permanently) by installing a switch that allowed me to power the HC12 independently of the Picaxe and using the "low HC12_SET - pause - power the HC12 - pause - configure" method as proposed by you. The other HC12 was irretrievably...
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