- Mon Jul 13, 2015 1:28 pm
#23165
A cheap serial adaptor would help, too - get the Arduino out of the picture, simplify the circuit.
- Mon Jul 13, 2015 1:33 pm
#23166
Just one on the ESP's RX in.
I'm told the ESP8266's want up to 260 mA peak. what's the rating of your psu for the Arduino? You can make a marginal power supply seem better with a 100 uf or higher capacitor right near the ESP... but no guarantees.
I have a 10v 1A wallwart which goes through a LM2596-type switching regulator to 5v (for my Raspberry Pi), then I have a 3.3v regulator and 10 uf caps near the ESP. I have had zero power or flashing problems in over 6 months of use. This I will guarantee
AlexPilk wrote:What about voltage dividers? Do I need 2 of them (one for TX and one for RX) or is it ok to use just one for RX?
Just one on the ESP's RX in.
If the wifi is working does it mean that Arduino's 3.3V power supply is enough for ESP8266?
I'm told the ESP8266's want up to 260 mA peak. what's the rating of your psu for the Arduino? You can make a marginal power supply seem better with a 100 uf or higher capacitor right near the ESP... but no guarantees.
I have a 10v 1A wallwart which goes through a LM2596-type switching regulator to 5v (for my Raspberry Pi), then I have a 3.3v regulator and 10 uf caps near the ESP. I have had zero power or flashing problems in over 6 months of use. This I will guarantee
- Mon Jul 13, 2015 1:35 pm
#23167
I agree with Mr Burkmurray,
The USB to UARTs ive been using are these:
http://www.ebay.com/itm/400565980221
5 pieces for $7.60. Can't go wrong with that price
The USB to UARTs ive been using are these:
http://www.ebay.com/itm/400565980221
5 pieces for $7.60. Can't go wrong with that price
Free ESP8266 book available for download here.
- Mon Jul 13, 2015 1:45 pm
#23169
Tried talking to it with CoolTerm. Got this: sr|
Then those after disconnecting and connecting a few times: ss} ~r} sr|
Arduino's Serial Monitor gives me this: ~˜þžþž`žøž†ž~ž€ž``üæžþžþžøž†æ€˜€
I don't know, looks like it's either broken or I fried it. In this case something must be wrong with TX/RX pins on ESP8266, right? Because wifi is working, which means VCC, CH_PD and GND are ok. Is there a way to check if those pins are alive?
Then those after disconnecting and connecting a few times: ss} ~r} sr|
Arduino's Serial Monitor gives me this: ~˜þžþž`žøž†ž~ž€ž``üæžþžþžøž†æ€˜€
I don't know, looks like it's either broken or I fried it. In this case something must be wrong with TX/RX pins on ESP8266, right? Because wifi is working, which means VCC, CH_PD and GND are ok. Is there a way to check if those pins are alive?
