Recent content by friis

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(...

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)...

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...

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

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...

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

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...

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

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

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...

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

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...

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

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

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...