7 - with Nexus5 keyboard and mouse are very laggy.
11 - When not connected in a few minutes get into deep sleep to save battery life
12 - CTS is needed for waking up from deep sleep? How deep sleep is activated?
13 - firmware controlled 3.3V DC converter to switch on/off BT module
14 - sleep MCU and BT module(keyboard is not used)
15 - deep sleep MCU and BT module(keyboard is not used for long time)
16 - deep sleep MCU and turn off BT module(keyboard is not used and not connected)
17 - Battery ADC; switching, high resistance
18 - switching gnd end of divider with PF4
19 - high resistor 100K/1M?
21 http://www.eevblog.com/forum/beginners/measuring-battery-voltage-without-consuming-current/
24 - BT LED; connecting, linked, sleeping, deep sleeping
25 - Battry LED; blink(using timer?)
26 - move rn42 to protocol directory when it becomes reusable stack
27 - LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
33 - Factroy reset doesn't work; need to **test again** 10K pull-up is too high?
34 - Lipo voltage ADC value is not stabilized
35 - DCDC converter: squeaky inducter; try other inductors
37 - Keymap layer bug: during space is pressed(mousekey) press Fn(HHKB) then release space before Fn, in result HHKB layer is locked(toggled) unintentionally.
41 - low battery alert(solid light) 09/04
50 | | |Switch/-----------------------+
59 +--------------+ +-----+ +------+ +---/--+ +-----+
60 |Power Selector|--|DC 5V|--|DC3.3V|---|Switch|----|RN-42|
61 +--------------+ +-----+ +------+ +------+ +-----+
62 USB Power is boosted unnecessarily, not harmful?
68 | | |Switch/----------+
77 +--------------+ | +---/--+ +------+ +-----+
78 |Power Selector|-----+---|Switch|----|DC3.3V|-----|RN-42|
79 +--------------+ +------+ +------+ +-----+
80 To enable BT when USB powered it still needs to turn siwtch on, Lipo consumes quinscent current at 5V converter in vain.(Not good)
91 | +-----+ |MCU|----+ Controlled by firmware
92 | |DC 5V| +---+ | On: Lipo powered
93 | +-----+ | | Off: USB powered
95 +--------------+ | +------+ +-----+
96 |Power Selector|-----+---|DC3.3V|-----|RN-42|
97 +--------------+ +------+ +-----+
98 MCU can controlled power of RN-42 without hardware switch.
99 When USB powered and switch is on Lipo consumes quinscent current at 5V converter in vain.(Not good)
105 | | |Switch|SPST(or without)
110 | | |MCU|----+ Controlled by firmware
111 | | +---+ | On: Lipo powered
112 | | | | Off: USB powered
114 +--------------+ +-----+ +------+ +-----+
115 |Power Selector|-|DC 5V|-|DC3.3V|-----|RN-42|
116 +--------------+ +-----+ +------+ +-----+
117 Switch is needed to save Lipo when not used because decent power saving is not available now. If firmware can turn off BT module completely and make MCU deep sleep the switch will be not even needed.
124 - BT_INDICATOR LED turns on wrongly when touching line or pin. -- pull-up enabled on PF6/GPIO2 08/30
125 - Lipo charger configuration: fast charge time: USB charger spec? -- used 2kohm
126 - use LED of charger to alarm low battery. LED should be powered directly from Lipo? - cancel; powered from VUSB
127 - Use RTS in serial_uart.c to resolve missing chars from help message of RN-42 - done
128 - CTS/RTS lines are needed? just connect in loop back if no flow control is needed. - done
129 - add IO pin to charger status CHRG; LED control(low) and detect charge status(input HiZ) 07.24
130 - LINKED: add trace on PIO2 to PF6 07.24
131 - Lipo voltage ADC sensing
132 - Lipo charger MCP73831: needs capacitor 4.7uF *2
133 - USB connection check - 07.01
134 - BT on/off check: whether RX line is pulled up? - checking RTS 07.01
135 - USB/BT switching BT is on -> BT, BT is off -> USB - 07.01
136 - Under voltage lock out UVLO for protection of Lipo - Lipo has discharge protection at 3.100V 07.01
137 - Power saving: HHKB scan, BT radio control - 9h with 850mAh, this is enough 07.01
138 - Power selector doesn't work; Q4 MOSFET leaks from Lipo to USB power line. -- use Schottky instead 07/04
144 07/16 After fix of voltage dividor on GPIO6, had a trouble that it could not send a char to BT module, though could receive.
145 Found R8 had wrong 1K resistor and changed to 10K, after that it can send to the module again. Not sure how it had sent with the wrong 1K before.
147 07/18 On Linux, had an USB related trouble; keyobard or console didn't work for some reason. Changing PID cured this problem. Very annoying, took very long time before resolved it.
153 850mA lasts around 9 hours(07/28)
155 Sparkfun Polymer Lithium Ion Battery 850mAh:
156 https://www.sparkfun.com/products/341
158 https://www.sparkfun.com/datasheets/Batteries/063048%20Li-polymer.pdf
160 http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/BatteryProtection.pdf
162 over-charge 4.255 4.280 4.305
163 over-charge discover? 4.030 4.080 4.130
164 over-discharge 2.827 2.900 2.973
165 over-discharge discover 3.022 3.100 3.178
167 ADC voltage monitor: voltage divider 10K+10K(0.5)
190 ***ADVANCED Settings***
191 SrvName= keyboard/mouse
217 Serial line: 115200bps, 8bit, 1-stopbit, non-parity, no flow control
218 SSP: 115200bps, 8bit, 1-stopbit, non-parity, no flow control(via Bluetooth)
220 To enter command mode disconnect the module from host and type '$$$'.(you will see 'CMD')
221 To exit type '---'(you will see 'END') and '+' to get local echo.
227 S-,tmkBT // Device name
228 SS,keyboard/mouse // service name
229 SM,4 // Auto Connect DTR mode
230 SW,8010 // Sniff enable 0x10*0.625ms=10ms; 50ms is laggish and not much power save
232 SH,003C // HID register
233 SY,0004 // Transmit power
239 SC,0000 // COD: 000005C0 (see HID spec/Bluegiga doc)
240 SD,05C0 // bit 12-8 7 6 5-0
242 // peripheral pointing keybaord joystick, gamepad, ...
243 SM,6 // Pairing mode: auto connect
244 SM,4 // Master mode: Connection can be controled with GPIO6
258 Keyboard can be used with iPhone, but mouse cannot.
259 To operate iOS with keyboard is not so useful, though.
260 There may be iOS specific scancodes?
268 10 0000 0000(0200) default
269 00 0011 1000(0038) Combo
270 || | | |\_\____ number of paired devices to which the module can reconnect
271 || | | \_______ send out reports over UART (0xFF <len> <data>)
272 || \__\_________ descriptor type
273 |\______________ toggle virtual keyboard on iOS when first connected
274 \_______________ Force HID mode if GPIO11 is high on power-up
285 Out report - Indicator
286 ----------------------
287 0xFE 0x02 0x01 <LED_state>
292 Configuring 10 times per sec
293 Startup/configuration timer 2 times per sec
294 Discoverable/Inquiring/Idle once per sec
300 First, host initiates pairing process and once it is done, auto connect will work thereafter.
302 SM,4 Auto Connect DTR Mode uses GPIO6 to make and break connection(Mode =DTR)
303 confirm: auto connect works and control connection with GPIO6
304 SM,5 Auto Connect ANY Mode (Mode =ANY)
305 each time GPIO is set, make inquiry and connect to the first found device
306 SM,6 automatically reconnect(Mode =Pair)
307 confirm: auto connect works well but difficult to enter command mode.
312 The module enters fast data mode after 'remote configuration timer' window is passed from power on.
313 In this mode the module does not accept '$$$' to enter command mode.
317 Inquiry and Page window Idle or Active (3.1.1)
318 Downside: delay in discovery or connection time
319 SI, // set inquiry scan window(discovery) on/off duty?
320 SJ, // set page scan window(connection)
321 This reduces averaege power >20mA to 5mA(3mA in Sniff mode)
324 Sniff mode is disabled by default and radio is active continuously when connected.(25-30mA)
325 In Sniff mode the radio wakes up intermittently and sleeps in very low power mode.(2mA)
326 SW,<val> // set interval timer(*0.625ms) 0000-7FFF
328 Deep sleep Idle (3.1.2)
329 In this mode the module shuts down completly and only draws about 300uA. To enable this set the most signifant bit(0x8000) of Sniff interaval timer.
330 SW,8320 // deep sleep enable(interval=0x320*0.625=500ms)
331 In normal sleep the firmware is still running in idle mode, and wakes up about 20 times per second to check ports, update LEDs, etc. During deep sleep, the firmware actually stops runnig some tasks and the LEDs only update about once per second.
332 To wake from deep sleep there are three ways: (in worst case wake up takes 5ms)
333 *send a charactor to the UART(first charactor will be lost)
334 *toggle CTS low to high and wait 5ms
335 *wake automatically every slot time(<val>*0.625ms)
336 Once the radio is awake it stay active for exactly 1 second of inactivity and then sleeps again.
337 Downside: latency and data loss
339 Disable Output driver Idle or Active (3.1.3)
340 S%,1000 // set all GPIO pins(0-11) to inputs.
342 Lower Transmit Power Idle or Active (3.1.4)
343 SY,<hex> // transmit power setting(takes effect after a power cycle and reboot)
344 Downside: reducing effective range
347 Optimizig for Latency
348 ---------------------
349 By default the firmware is optimized for throughput.
350 SQ,16 // set latency bit
351 SQ,0 // unset latency bit
354 Configuration timer settings
355 ----------------------------
356 Remote configuration is used for the module to be configured with various commands over Bluetooth(SPP profile only?).
358 The module has remote configuration timer to allow remote configuration over Bluetooth after power up in Slave mode. In Master modes the remote configuration timer is set to 0(no remote configuration). (In Trigger Master mode the timer is used as an idle timer to break the connection after time expires with no charactors receive.)
359 ST,0 // no remote, no local when connected
360 ST,<1-252> // local and remote with timeout in seconds from power up
361 ST,253 // local only without timeout
362 ST,254 // remote only without timeout
363 ST,255 // local and remote without timeout
368 3.7.1.5 Note: To connect with Android phone the modules must wake up 11ms every 2.5seconds.
376 SP,<string> Pin code(alpahnumeric)
377 SQ,<mask> Special configuration(GPIO, discovery mode, low latency, reboot, UART)
378 SR,<hex> Store remote address
379 SR,Z Erase all address
380 SS,<string> Set service name(1-20)**
381 ST,<val> Remote configuration timer(Master:0, Slave:0-255, Triger:as idle timer)
382 SU,<val> UART baud rate
383 SW,<val> low-power sniff mode** deep sleep and wake up every 625us * <val>
384 SX,<0|1> bonding enable only acceps device that matches the stored address
385 SY,<hex> power setting**
386 SZ,<val> non-standard raw baud rate <val>=baud*0.004096
387 S~,<val> Profile 0:SPP, 5:APL, 6:HID
388 S-,<string> Device name -15 alphanumeric charactors
389 S?,<0|1> role switch enable
390 S$,<char> command mode char
391 $|,<hex> low-power connect mode deep sleep/active(discoverable and connectable) cycle
392 D display basic setting
393 E display extended setting
394 GB display the device's Bluetooth address
395 GF display Bluetooth address of connected device
396 GK show connection status
397 GR show remote address for reconnecting
399 G<char> show stored setting
400 + toggle local echo on/off
401 & show GPIO 3,4,6,7(DIP switch)
402 C connect to stored remote address
403 C,<address> connect last address
404 CFI connect and go into fast data mode
405 CFR connect and go into fast data mode
406 CT,<address>,<val> connect to the address and disconnect after val?
409 I,<time>,<cod> inquiry scan with <cod>
412 IS inquiry scan with 001F00
414 K, kill disconnects current connection
416 M show modem signlal status
417 O display other settings
418 P,<car> pass through?
419 Q quiet mode make the module not discoverable
420 Q,0 discoverable and connectable
421 Q,1 not discoverable and not connectable
422 Q,2 not discoverable and connectable
423 Q,? display current quiet mode
425 T,<0|1> pass received data while in command mode
426 U,<baud>,<parity> change UART setting tentatively
427 V display firmware version
428 W wake from quiet mode enable discovery and connection
429 Z deep sleep mode(<2mA)
436 SA,<3,0> - Authentication
437 SC,<hex> - Service Class
438 SD,<hex> - Device Class
440 SF,1 - Factory Defaults
442 SI,<hex> - Inquiry Scan Window
443 SJ,<hex> - Page Scan Window
445 SM,<0-5> - Mode (0=slav,1=mstr,2=trig,3=auto,4=DTR,5=Any)
447 SO,<text> - conn/discon Status
449 SR,<adr> - Remote Address
450 SS,<text> - Service Name
451 ST,<num> - Config Timer
453 SW,<hex> - Sniff Rate
456 SZ,<num> - Raw Baudrate
457 S~,<0-6> - Profile (0=SPP,1=DCE,2=DTE,3=MDM,4=D&S,6=HID
458 S?,<0-1> - role switch
459 S$,<char> - CMD mode char
460 S@,<hex> - io port dir
461 S&,<hex> - io port val
462 S%,<hex> - io boot dir
463 S^,<hex> - io boot val
464 S*,<hex> - pio(8-11) set
465 S|,<hex> - low power timers
467 S=,<hex> - Key mapper
468 S:,<num> - sleep timer
471 E - Extended Settings
472 G<X> - Stored setting
474 GF - BT Address of Last Connection
481 I,<time>,<cod> - Device Scan Inquiry
483 K, - Kill (disconnect)
484 L, - toggle local echo
486 Q - Quiet (no discovery)
488 T,<0,1> - send data in CMD mode
489 U,<rate>,<E,O,N> - Temp Uart Change