Radio: Futaba 7PX

[wienne]

Radio: Futaba 7PX
Version: 4.0S
Receiver: R304SB (T-FHSS)

Currently I only need voltage data.

The value displayed on the remote control is not the voltage value directly specified in the code.

This proportional relationship is puzzling.

[wienne]

Value	voltage
1	0
2	0
3	0
4	0
5	2.5
6	2.5
7	2.5
8	2.5
9	2.5
10	2.5
11	2.5
12	5.1
13	5.1
14	5.1
15	5.1
16	5.1
17	5.1
18	7.6
19	7.6
20	7.6
21	7.6
22	7.6
23	7.6
24	10.2
25	10.2
26	10.2
27	10.2
28	10.2
29	10.2
30	12.8
31	12.8
32	12.8
33	12.8
34	12.8
35	12.8
36	15.3
37	15.3
38	15.3
39	15.3
40	15.3
41	15.3
42	17.9
43	17.9
44	17.9
45	17.9
46	17.9
47	17.9
48	20.4
49	20.4
50	20.4
51	20.4
52	20.4
53	20.4
54	23
55	23
56	23
57	23
58	23
59	23
60	25.6
61	25.6
62	25.6
63	25.6
64	25.6
65	25.6
66	28.1
67	28.1
68	28.1
69	28.1
70	28.1
71	28.1
72	30.7
73	30.7
74	30.7
75	30.7
76	30.7
77	30.7
78	33.2
79	33.2
80	33.2
81	33.2
82	33.2
83	33.2
84	35.8
85	35.8
86	35.8
87	35.8
88	35.8
89	35.8
90	38.4
91	38.4
92	38.4
93	38.4
94	38.4
95	38.4
96	40.9
97	40.9
98	40.9
99	40.9
100	40.9
101	40.9
102	43.5
103	43.5
104	43.5
105	43.5
106	43.5
107	43.5
108	46
109	46
110	46
111	46
112	46
113	46
114	48.6
115	48.6
116	48.6
117	48.6
118	48.6
119	48.6
120	51.2
121	51.2
122	51.2
123	51.2
124	51.2
125	51.2
126	53.7
127	53.7
128	53.7
129	53.7
130	53.7
131	53.7
132	56.3
133	56.3
134	56.3
135	56.3
136	56.3
137	56.3
138	58.8
139	58.8
140	58.8
141	58.8
142	58.8
143	58.8
144	61.4
145	61.4
146	61.4
147	61.4
148	61.4
149	61.4
150	64
151	64
152	64
153	64
154	64
155	64
156	66.5
157	66.5
158	66.5
159	66.5
160	66.5
161	66.5
162	69.1
163	69.1
164	69.1
165	69.1
166	69.1
167	69.1
168	71.6
169	71.6
170	71.6
171	71.6
172	71.6
173	71.6
174	74.2
175	74.2
176	74.2
177	74.2
178	74.2
179	74.2
180	76.8
181	76.8
182	76.8
183	76.8
184	76.8
185	76.8
186	79.3
187	79.3
188	79.3
189	79.3
190	79.3
191	79.3
192	81.9
193	81.9
194	81.9
195	81.9
196	81.9
197	81.9
198	84.4
199	84.4
200	84.4
201	84.4
202	84.4
203	84.4
204	87
205	87
206	87
207	87
208	87
209	87
210	89.6
211	89.6
212	89.6
213	89.6
214	89.6
215	89.6
216	92.1
217	92.1
218	92.1
219	92.1
220	92.1
221	92.1
222	94.7
223	94.7
224	94.7
225	94.7
226	94.7
227	94.7
228	97.2
229	97.2
230	97.2
231	97.2
232	97.2
233	97.2
234	99.8
235	99.8
236	99.8
237	99.8
238	99.8
239	99.8
240	2.4
241	2.4
242	2.4
243	2.4
244	2.4
245	2.4
246	4.9
247	4.9
248	4.9
249	4.9
250	4.9
251	4.9
252	7.5
253	7.9
254	7.9
255	7.9
256	7.9
257	7.9
258	10
259	10
260	10
261	10
262	10
263	10
264	12.6
265	12.6
266	12.6
267	12.6
268	12.6
269	12.6
270	15.2
271	15.2
272	15.2
273	15.2
274	15.2
275	15.2
276	17.7
277	17.7
278	17.7
279	17.7
280	17.7
281	17.7
282	20.3
283	20.3
284	20.3
285	20.3
286	20.3
287	20.3
288	22.8
289	22.8
290	22.8
291	22.8
292	22.8
293	22.8
294	25.4
295	25.4
296	25.4
297	25.4
298	25.4
299	25.4
300	28
301	28
302	28
303	28
304	28
305	28
306	30.5
307	30.5
308	30.5
309	30.5
310	30.5
311	30.5
312	33.1
313	33.1
314	33.1
315	33.1
316	33.1
317	33.1
318	35.6
319	35.6
320	35.6
321	35.6
322	35.6
323	35.6
324	38.2
325	38.2
326	38.2
327	38.2
328	38.2
329	38.2
330	40.8
331	40.8
332	40.8
333	40.8
334	40.8
335	40.8
336	43.3
337	43.3
338	43.3
339	43.3
340	43.3
341	43.3
342	45.9
343	45.9
344	45.9
345	45.9
346	45.9
347	45.9
348	48.4
349	48.4
350	48.4
351	48.4
352	48.4
353	48.4
354	51
355	51
356	51
357	51
358	51
359	51
360	53.6
361	53.6
362	53.6
363	53.6
364	53.6
365	53.6
366	56.1
367	56.1
368	56.1
369	56.1
370	56.1
371	56.1
372	58.7
373	58.7
374	58.7
375	58.7
376	58.7
377	58.7
378	61.2
379	61.2
380	61.2
381	61.2
382	61.2
383	61.2
384	63.8
385	63.8
386	63.8
387	63.8
388	63.8
389	63.8
390	66.4
391	66.4
392	66.4
393	66.4
394	66.4
395	66.4
396	68.9
397	68.9
398	68.9
399	68.9
400	68.9
401	68.9
402	71.5
403	71.5
404	71.5
405	71.5
406	71.5
407	71.5
408	74
409	74
410	74
411	74
412	74
413	74
414	76.6
415	76.6
416	76.6
417	76.6
418	76.6
419	76.6
420	79.2
421	79.2
422	79.2
423	79.2
424	79.2
425	79.2
426	81.7
427	81.7
428	81.7
429	81.7
430	81.7
431	81.7
432	84.3
433	84.3
434	84.3
435	84.3
436	84.3
437	84.3
438	86.8
439	86.8
440	86.8
441	86.8
442	86.8
443	86.8
444	89.4
445	89.4
446	89.4
447	89.4
448	89.4
449	89.4
450	92
451	92
452	92
453	92
454	92
455	92
456	94.5
457	94.5
458	94.5
459	94.5
460	94.5
461	94.5
462	97.1
463	97.1
464	97.1
465	97.1
466	97.1
467	97.1
468	99.6
469	99.6
470	99.6
471	99.6
472	99.6
473	99.6
474	2.2
475	2.2
476	2.2
477	2.2
478	2.2
479	2.2
480	4.8
481	4.8
482	4.8
483	4.8
484	4.8
485	4.8
486	7.3
487	7.3
488	7.3
489	7.3
490	7.3
491	7.3
492	9.9
493	9.9
494	9.9
495	9.9
496	9.9
497	9.9
498	12.4
499	12.4
500	12.4
501	12.4
502	12.4
503	12.4
504	15
505	15
506	15
507	15
508	15
509	15
510	17.6

[BrushlessPower]

Hello Wienne,

could you give me which Sensor you use in your 7PX?
SBS/01V?
F1678?
These two Sensors have different internal Logic. The F1678 (Current,Voltage,Capacity) is Supported.
SBS/01V is actual not supported. But i could implement this Sensor.

are the other Sensors working?

Greetings

[BrushlessPower]

just saw in the Futaba Documntation that the F1678 is not supported by the 7PX

is that right?
so i assume that you are using the SBS/01V Sensor.

Give me some Days, i will send you some code.
If its working i will add it to the Code on Git

....maybe i should add Sensors with the real Name to avoid misunderstandings

[wienne]

Thank you very much for replying to this post.

I use a current sensor. Only this sensor has a change in voltage.

Others, such as temperature, also change, but the values ​​are too exaggerated.
For example, the test value is several tens, but the displayed temperature is several thousands.
RPM speed, GPS, there is a return value, but the value is absolutely incorrect.
It's just that I don't plan to use them at the moment, so I didn't pay attention to them.

A name like F1678 confuses me a bit,
I seem to see many similar names in the 18SZ sensor list.
I didn't know their role, so I didn't pay attention to and remember their names.
It is impossible to determine whether the name of the sensor you mentioned is used.

Until this morning, I tested the same code using Futaba 18sz and 7008SB.
It was just a little rushed in the morning and I simply tested the current sensor.
Like 7PX, only the voltage, current, and capacity in the current sensor have numerical changes, and the rules are the same.
The separate voltage sensor does not return any value.

The current in the current sensor has a more intuitive proportional relationship with the test value.
For example, 100 will show a current of 1A. 800-> 8A
However, 1000 will also show a current of 1A, 1500-> 15A.
Detailed and accurate correspondence, I have to do testing and recording.

Due to a business trip today, I will not be able to return home until January 11, 2020.
After relevant tests,
I can then reply to the exact names of the sensors I use, and which sensors will display changing values, and the law between the values ​​and the voltage.

 Your response gives me the motivation to perform these tests, thank you very much.

[BrushlessPower]

dear Wienne,

for further support, please send me your arduino sketch. or use the default sketch from github.

next general thing:
a current value of 100 is 1.00 A in the display of your 7PX or 18SZ.
So the real current has to be multiplied by 100
the same for Voltage. A Value of 1234 is displayed as 12.34V

Please look at the comments in my example sketch.

all other issues could be caused by wrong Sensor settings
but i need the exact settings in your 7PX and 18SZ.
the 18SZ with R7008 should run all Sensors without issues.

until 11, January i will send you the code (with instructions) for the Voltage-Only-Sensor (SBS/01V)

if it's easier for you, you can write me an email: brushlesspower@protonmail.com

[BrushlessPower]

here is the Code for you:
its the implementation of the SBS/01V Voltage Sensor. This Sensor measures 2 Voltages. RX Voltage and external Voltage. It's the same like the Voltage measuring done in R7008.

.INO file:
#define VOLTAGE_SLOT 16 // 2 Slot Sensor

in loop add:
send_voltage(VOLTAGE_SLOT,(uint16_t)128, (uint16_t)255); // Voltage1 = 12.8V, Voltage2 = 25.5V

in SBUS2.cpp add:
void send_voltage(uint8_t port,uint16_t voltage1, uint16_t voltage2)
{
uint16_t value = 0;
uint8_t bytes[SBUS2_TEL_DATA_SIZE] = {0x03, 0x40, 0x00 };

// VOLTAGE1
value = voltage1 | 0x8000;
if ( value > 0x9FFF )
{
// max voltage is 819.1
value = 0x9FFF;
}
bytes[1] = value >> 8;
bytes[2] = value;
SBUS2_transmit_telemetry_data( port , bytes);

//VOLTAGE2
value = voltage2;
if ( value > 0x1FFF )
{
// max voltagee is 819.1
value = 0x1FFF;
}
bytes[1] = value >> 8;
bytes[2] = value;
SBUS2_transmit_telemetry_data( port+1 , bytes);
}

in SBUS2.h add:
void send_voltage(uint8_t port,uint16_t voltage1, uint16_t voltage2);

[wienne]

Setting the slot where the sensor is located is key. Temp-F1713 temperature sensor must be in slot 1 or 8 or 9. The current sensor or F1678 sensor can only be used in slot 3. The RPM sensor can only be used in slot 2. The specified value is slightly different from the displayed value. GPS-F1675 sensor, only in slot 8. Voltage sensor only in slot 16. In slot 10, the battery voltage value is incorrect, and the ratio of the external voltage value to the display is 1: 1 At 16 slots, the value of the battery voltage is the same as the value of the external voltage, and the ratio of the specified value to the displayed value is 10: 1, which is the same as the example in the code. The above test was successful in 18SZ + R7008SB. At 7PX + R304SB, except for GPS, it is the same as 18SZ. There is no GPS-F1675 sensor in the 7PX, only the GPS sensor. In any slot (8,16,24) is set to GPS, the value is empty. I thought of another question, if there are more than two temperature sensors, how should I achieve it? Using more than two arduino? Is there a code for the altitude sensor currently?

[ericlangel]

Dear Wienne,

its hard to understand you correctly. I think you dont know much about Futaba Telemetry?
And i think you dont read any Comments or documentation.

"Temp-F1713 temperature sensor must be in slot 1 or 8 or 9."
-> NO. With my default Arduino project you have to Set the Sensor to SLOT 1. Slot 8 and 9 are for GPS Module.

"In slot 10, the battery voltage value is incorrect, and the ratio of the external voltage value to the display is 1: 1"
-> Of course it's incorrect. SLOT 10 is GPS Sensor

"There is no GPS-F1675 sensor in the 7PX, only the GPS sensor.
In any slot (8,16,24) is set to GPS, the value is empty."
-> Right. The 7PX doesn't support the F1675. And there you have a Problem: The F1675 Sensor is the only documented GPS Sensor.
All other GPS Sensors are not documented. So i cant implement them to this Library.

"I thought of another question, if there are more than two temperature sensors, how should I achieve it?
Using more than two arduino?"
-> No, just change the Slot Number:
send_temp125(1, (int16_t)50); -> Slot 1
send_temp125(2, (int16_t)60); -> Slot 2
send_temp125(3, (int16_t)70); -> Slot 3
send_temp125(4, (int16_t)80); -> Slot 4

Keep in Mind....just 1 Sensor per Slot!
If you have more Problems, please send me pictures of the 7PX Display and your Arduino Project.

"Is there a code for the altitude sensor currently?"
-> No. it's planned with the next release

[BrushlessPower]

i think the Problems are solved with the new Readme